Vulnerability-Lookup

EUVD-2026-344746

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:57

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

JSON

To clipboard

{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:57:53.056907+00:00",
  "id": "EUVD-2026-344746"
}

CVE-2022-49505 (GCVE-0-2022-49505)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:13 – Updated: 2026-08-05 08:55

Title

NFC: NULL out the dev->rfkill to prevent UAF

Summary

In the Linux kernel, the following vulnerability has been resolved: NFC: NULL out the dev->rfkill to prevent UAF Commit 3e3b5dfcd16a ("NFC: reorder the logic in nfc_{un,}register_device") assumes the device_is_registered() in function nfc_dev_up() will help to check when the rfkill is unregistered. However, this check only take effect when device_del(&dev->dev) is done in nfc_unregister_device(). Hence, the rfkill object is still possible be dereferenced. The crash trace in latest kernel (5.18-rc2): [ 68.760105] ================================================================== [ 68.760330] BUG: KASAN: use-after-free in __lock_acquire+0x3ec1/0x6750 [ 68.760756] Read of size 8 at addr ffff888009c93018 by task fuzz/313 [ 68.760756] [ 68.760756] CPU: 0 PID: 313 Comm: fuzz Not tainted 5.18.0-rc2 #4 [ 68.760756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 [ 68.760756] Call Trace: [ 68.760756] <TASK> [ 68.760756] dump_stack_lvl+0x57/0x7d [ 68.760756] print_report.cold+0x5e/0x5db [ 68.760756] ? __lock_acquire+0x3ec1/0x6750 [ 68.760756] kasan_report+0xbe/0x1c0 [ 68.760756] ? __lock_acquire+0x3ec1/0x6750 [ 68.760756] __lock_acquire+0x3ec1/0x6750 [ 68.760756] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 68.760756] ? register_lock_class+0x18d0/0x18d0 [ 68.760756] lock_acquire+0x1ac/0x4f0 [ 68.760756] ? rfkill_blocked+0xe/0x60 [ 68.760756] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 68.760756] ? mutex_lock_io_nested+0x12c0/0x12c0 [ 68.760756] ? nla_get_range_signed+0x540/0x540 [ 68.760756] ? _raw_spin_lock_irqsave+0x4e/0x50 [ 68.760756] _raw_spin_lock_irqsave+0x39/0x50 [ 68.760756] ? rfkill_blocked+0xe/0x60 [ 68.760756] rfkill_blocked+0xe/0x60 [ 68.760756] nfc_dev_up+0x84/0x260 [ 68.760756] nfc_genl_dev_up+0x90/0xe0 [ 68.760756] genl_family_rcv_msg_doit+0x1f4/0x2f0 [ 68.760756] ? genl_family_rcv_msg_attrs_parse.constprop.0+0x230/0x230 [ 68.760756] ? security_capable+0x51/0x90 [ 68.760756] genl_rcv_msg+0x280/0x500 [ 68.760756] ? genl_get_cmd+0x3c0/0x3c0 [ 68.760756] ? lock_acquire+0x1ac/0x4f0 [ 68.760756] ? nfc_genl_dev_down+0xe0/0xe0 [ 68.760756] ? lockdep_hardirqs_on_prepare+0x410/0x410 [ 68.760756] netlink_rcv_skb+0x11b/0x340 [ 68.760756] ? genl_get_cmd+0x3c0/0x3c0 [ 68.760756] ? netlink_ack+0x9c0/0x9c0 [ 68.760756] ? netlink_deliver_tap+0x136/0xb00 [ 68.760756] genl_rcv+0x1f/0x30 [ 68.760756] netlink_unicast+0x430/0x710 [ 68.760756] ? memset+0x20/0x40 [ 68.760756] ? netlink_attachskb+0x740/0x740 [ 68.760756] ? __build_skb_around+0x1f4/0x2a0 [ 68.760756] netlink_sendmsg+0x75d/0xc00 [ 68.760756] ? netlink_unicast+0x710/0x710 [ 68.760756] ? netlink_unicast+0x710/0x710 [ 68.760756] sock_sendmsg+0xdf/0x110 [ 68.760756] __sys_sendto+0x19e/0x270 [ 68.760756] ? __ia32_sys_getpeername+0xa0/0xa0 [ 68.760756] ? fd_install+0x178/0x4c0 [ 68.760756] ? fd_install+0x195/0x4c0 [ 68.760756] ? kernel_fpu_begin_mask+0x1c0/0x1c0 [ 68.760756] __x64_sys_sendto+0xd8/0x1b0 [ 68.760756] ? lockdep_hardirqs_on+0xbf/0x130 [ 68.760756] ? syscall_enter_from_user_mode+0x1d/0x50 [ 68.760756] do_syscall_64+0x3b/0x90 [ 68.760756] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 68.760756] RIP: 0033:0x7f67fb50e6b3 ... [ 68.760756] RSP: 002b:00007f67fa91fe90 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [ 68.760756] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f67fb50e6b3 [ 68.760756] RDX: 000000000000001c RSI: 0000559354603090 RDI: 0000000000000003 [ 68.760756] RBP: 00007f67fa91ff00 R08: 00007f67fa91fedc R09: 000000000000000c [ 68.760756] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffe824d496e [ 68.760756] R13: 00007ffe824d496f R14: 00007f67fa120000 R15: 0000000000000003 [ 68.760756] </TASK> [ 68.760756] [ 68.760756] Allocated by task 279: [ 68.760756] kasan_save_stack+0x1e/0x40 [ ---truncated---

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-27 17:58 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux mitre root Scorecard

References

9 references

URL	Tags
https://git.kernel.org/stable/c/a8e03bcad52dc9afa…
https://git.kernel.org/stable/c/f81270125b5053262…
https://git.kernel.org/stable/c/6abfaca8711803d0d…
https://git.kernel.org/stable/c/fbf9c4c714d3cdeb9…
https://git.kernel.org/stable/c/2a1b5110c95e4d49c…
https://git.kernel.org/stable/c/1632be63862f183cd…
https://git.kernel.org/stable/c/4a68938f43b7c2663…
https://git.kernel.org/stable/c/4f5d71930f41be785…
https://git.kernel.org/stable/c/1b0e81416a24d6e9b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ff169909eac9e00bf1aa0af739ba6ddfb1b1d135 , < a8e03bcad52dc9afabf650fdbad84f739cec9efa (git) Affected: 47244ac0b65bd74cc70007d8e1bac68bd2baad19 , < f81270125b50532624400063281e6611ecd61ddf (git) Affected: c45cea83e13699bdfd47842e04d09dd43af4c371 , < 6abfaca8711803d0d7cc8c0fac1070a88509d463 (git) Affected: 307d2e6cebfca9d92f86c8e2c8e3dd4a8be46ba6 , < fbf9c4c714d3cdeb98b6a18e4d057f931cad1d81 (git) Affected: 73a0d12114b4bc1a9def79a623264754b9df698e , < 2a1b5110c95e4d49c8c3906270dfcde680a5a7be (git) Affected: 8a9c61c3ef187d8891225f9b932390670a43a0d3 , < 1632be63862f183cd5cf1cc094e698e6ec005dfd (git) Affected: 3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 , < 4a68938f43b7c2663e4c90bb9bbe29ac8b9a42a0 (git) Affected: 3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 , < 4f5d71930f41be78557f9714393179025baacd65 (git) Affected: 3e3b5dfcd16a3e254aab61bd1e8c417dd4503102 , < 1b0e81416a24d6e9b8c2341e22e8bf48f8b8bfc9 (git) Affected: 5ef16d2d172ee56714cff37cd005b98aba08ef5a (git) Affected: 4.9.291 , < 4.9.318 (semver) Affected: 4.14.256 , < 4.14.283 (semver) Affected: 4.19.218 , < 4.19.247 (semver) Affected: 5.4.162 , < 5.4.198 (semver) Affected: 5.10.82 , < 5.10.121 (semver) Affected: 5.15.5 , < 5.15.46 (semver) Affected: 4.4.293 , < 4.5 (semver)
Linux	Linux	Affected: 5.16 Unaffected: 0 , < 5.16 (semver) Unaffected: 4.9.318 , ≤ 4.9.* (semver) Unaffected: 4.14.283 , ≤ 4.14.* (semver) Unaffected: 4.19.247 , ≤ 4.19.* (semver) Unaffected: 5.4.198 , ≤ 5.4.* (semver) Unaffected: 5.10.121 , ≤ 5.10.* (semver) Unaffected: 5.15.46 , ≤ 5.15.* (semver) Unaffected: 5.17.14 , ≤ 5.17.* (semver) Unaffected: 5.18.3 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49505",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-27T17:58:28.672028Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-27T18:02:28.632Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/nfc/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a8e03bcad52dc9afabf650fdbad84f739cec9efa",
              "status": "affected",
              "version": "ff169909eac9e00bf1aa0af739ba6ddfb1b1d135",
              "versionType": "git"
            },
            {
              "lessThan": "f81270125b50532624400063281e6611ecd61ddf",
              "status": "affected",
              "version": "47244ac0b65bd74cc70007d8e1bac68bd2baad19",
              "versionType": "git"
            },
            {
              "lessThan": "6abfaca8711803d0d7cc8c0fac1070a88509d463",
              "status": "affected",
              "version": "c45cea83e13699bdfd47842e04d09dd43af4c371",
              "versionType": "git"
            },
            {
              "lessThan": "fbf9c4c714d3cdeb98b6a18e4d057f931cad1d81",
              "status": "affected",
              "version": "307d2e6cebfca9d92f86c8e2c8e3dd4a8be46ba6",
              "versionType": "git"
            },
            {
              "lessThan": "2a1b5110c95e4d49c8c3906270dfcde680a5a7be",
              "status": "affected",
              "version": "73a0d12114b4bc1a9def79a623264754b9df698e",
              "versionType": "git"
            },
            {
              "lessThan": "1632be63862f183cd5cf1cc094e698e6ec005dfd",
              "status": "affected",
              "version": "8a9c61c3ef187d8891225f9b932390670a43a0d3",
              "versionType": "git"
            },
            {
              "lessThan": "4a68938f43b7c2663e4c90bb9bbe29ac8b9a42a0",
              "status": "affected",
              "version": "3e3b5dfcd16a3e254aab61bd1e8c417dd4503102",
              "versionType": "git"
            },
            {
              "lessThan": "4f5d71930f41be78557f9714393179025baacd65",
              "status": "affected",
              "version": "3e3b5dfcd16a3e254aab61bd1e8c417dd4503102",
              "versionType": "git"
            },
            {
              "lessThan": "1b0e81416a24d6e9b8c2341e22e8bf48f8b8bfc9",
              "status": "affected",
              "version": "3e3b5dfcd16a3e254aab61bd1e8c417dd4503102",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5ef16d2d172ee56714cff37cd005b98aba08ef5a",
              "versionType": "git"
            },
            {
              "lessThan": "4.9.318",
              "status": "affected",
              "version": "4.9.291",
              "versionType": "semver"
            },
            {
              "lessThan": "4.14.283",
              "status": "affected",
              "version": "4.14.256",
              "versionType": "semver"
            },
            {
              "lessThan": "4.19.247",
              "status": "affected",
              "version": "4.19.218",
              "versionType": "semver"
            },
            {
              "lessThan": "5.4.198",
              "status": "affected",
              "version": "5.4.162",
              "versionType": "semver"
            },
            {
              "lessThan": "5.10.121",
              "status": "affected",
              "version": "5.10.82",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.46",
              "status": "affected",
              "version": "5.15.5",
              "versionType": "semver"
            },
            {
              "lessThan": "4.5",
              "status": "affected",
              "version": "4.4.293",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/nfc/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.318",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.283",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.247",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.318",
                  "versionStartIncluding": "4.9.291",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.283",
                  "versionStartIncluding": "4.14.256",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.247",
                  "versionStartIncluding": "4.19.218",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.198",
                  "versionStartIncluding": "5.4.162",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.121",
                  "versionStartIncluding": "5.10.82",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.46",
                  "versionStartIncluding": "5.15.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.14",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.3",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "4.4.293",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFC: NULL out the dev-\u003erfkill to prevent UAF\n\nCommit 3e3b5dfcd16a (\"NFC: reorder the logic in nfc_{un,}register_device\")\nassumes the device_is_registered() in function nfc_dev_up() will help\nto check when the rfkill is unregistered. However, this check only\ntake effect when device_del(\u0026dev-\u003edev) is done in nfc_unregister_device().\nHence, the rfkill object is still possible be dereferenced.\n\nThe crash trace in latest kernel (5.18-rc2):\n\n[   68.760105] ==================================================================\n[   68.760330] BUG: KASAN: use-after-free in __lock_acquire+0x3ec1/0x6750\n[   68.760756] Read of size 8 at addr ffff888009c93018 by task fuzz/313\n[   68.760756]\n[   68.760756] CPU: 0 PID: 313 Comm: fuzz Not tainted 5.18.0-rc2 #4\n[   68.760756] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\n[   68.760756] Call Trace:\n[   68.760756]  \u003cTASK\u003e\n[   68.760756]  dump_stack_lvl+0x57/0x7d\n[   68.760756]  print_report.cold+0x5e/0x5db\n[   68.760756]  ? __lock_acquire+0x3ec1/0x6750\n[   68.760756]  kasan_report+0xbe/0x1c0\n[   68.760756]  ? __lock_acquire+0x3ec1/0x6750\n[   68.760756]  __lock_acquire+0x3ec1/0x6750\n[   68.760756]  ? lockdep_hardirqs_on_prepare+0x410/0x410\n[   68.760756]  ? register_lock_class+0x18d0/0x18d0\n[   68.760756]  lock_acquire+0x1ac/0x4f0\n[   68.760756]  ? rfkill_blocked+0xe/0x60\n[   68.760756]  ? lockdep_hardirqs_on_prepare+0x410/0x410\n[   68.760756]  ? mutex_lock_io_nested+0x12c0/0x12c0\n[   68.760756]  ? nla_get_range_signed+0x540/0x540\n[   68.760756]  ? _raw_spin_lock_irqsave+0x4e/0x50\n[   68.760756]  _raw_spin_lock_irqsave+0x39/0x50\n[   68.760756]  ? rfkill_blocked+0xe/0x60\n[   68.760756]  rfkill_blocked+0xe/0x60\n[   68.760756]  nfc_dev_up+0x84/0x260\n[   68.760756]  nfc_genl_dev_up+0x90/0xe0\n[   68.760756]  genl_family_rcv_msg_doit+0x1f4/0x2f0\n[   68.760756]  ? genl_family_rcv_msg_attrs_parse.constprop.0+0x230/0x230\n[   68.760756]  ? security_capable+0x51/0x90\n[   68.760756]  genl_rcv_msg+0x280/0x500\n[   68.760756]  ? genl_get_cmd+0x3c0/0x3c0\n[   68.760756]  ? lock_acquire+0x1ac/0x4f0\n[   68.760756]  ? nfc_genl_dev_down+0xe0/0xe0\n[   68.760756]  ? lockdep_hardirqs_on_prepare+0x410/0x410\n[   68.760756]  netlink_rcv_skb+0x11b/0x340\n[   68.760756]  ? genl_get_cmd+0x3c0/0x3c0\n[   68.760756]  ? netlink_ack+0x9c0/0x9c0\n[   68.760756]  ? netlink_deliver_tap+0x136/0xb00\n[   68.760756]  genl_rcv+0x1f/0x30\n[   68.760756]  netlink_unicast+0x430/0x710\n[   68.760756]  ? memset+0x20/0x40\n[   68.760756]  ? netlink_attachskb+0x740/0x740\n[   68.760756]  ? __build_skb_around+0x1f4/0x2a0\n[   68.760756]  netlink_sendmsg+0x75d/0xc00\n[   68.760756]  ? netlink_unicast+0x710/0x710\n[   68.760756]  ? netlink_unicast+0x710/0x710\n[   68.760756]  sock_sendmsg+0xdf/0x110\n[   68.760756]  __sys_sendto+0x19e/0x270\n[   68.760756]  ? __ia32_sys_getpeername+0xa0/0xa0\n[   68.760756]  ? fd_install+0x178/0x4c0\n[   68.760756]  ? fd_install+0x195/0x4c0\n[   68.760756]  ? kernel_fpu_begin_mask+0x1c0/0x1c0\n[   68.760756]  __x64_sys_sendto+0xd8/0x1b0\n[   68.760756]  ? lockdep_hardirqs_on+0xbf/0x130\n[   68.760756]  ? syscall_enter_from_user_mode+0x1d/0x50\n[   68.760756]  do_syscall_64+0x3b/0x90\n[   68.760756]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[   68.760756] RIP: 0033:0x7f67fb50e6b3\n...\n[   68.760756] RSP: 002b:00007f67fa91fe90 EFLAGS: 00000293 ORIG_RAX: 000000000000002c\n[   68.760756] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f67fb50e6b3\n[   68.760756] RDX: 000000000000001c RSI: 0000559354603090 RDI: 0000000000000003\n[   68.760756] RBP: 00007f67fa91ff00 R08: 00007f67fa91fedc R09: 000000000000000c\n[   68.760756] R10: 0000000000000000 R11: 0000000000000293 R12: 00007ffe824d496e\n[   68.760756] R13: 00007ffe824d496f R14: 00007f67fa120000 R15: 0000000000000003\n\n[   68.760756]  \u003c/TASK\u003e\n[   68.760756]\n[   68.760756] Allocated by task 279:\n[   68.760756]  kasan_save_stack+0x1e/0x40\n[\n---truncated---"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The UAF is reached via local netlink (NFC_CMD_DEV_UP \u2192 nfc_genl_dev_up \u2192 nfc_dev_up) raced with local device teardown (TTY N_NCI close / nfc_unregister_device), not via NFC radio frames or remote packet processing.\nAC:L - The attacker controls both sides of the race\u2014creating/destroying an NFC device (e.g. N_NCI on a PTY with nfcmrvl) while issuing concurrent NFC_CMD_DEV_UP\u2014and the window between rfkill_destroy and device_del includes sleeping work (llcp unregister, timers), so the race is reliably repeatable.\nPR:L - Unprivileged users can attach N_NCI and register/unregister NFC devices with no capability check on the TTY path; NFC_CMD_DEV_UP uses GENL_ADMIN_PERM, but on NFC-enabled systems a management daemon performs DEV_UP, and when uncertain between PR:L and PR:H the higher-severity Low is chosen.\nUI:N - The attacker drives device create/teardown and DEV_UP (directly or via racing an always-on NFC service) without any separate victim action such as mounting a filesystem or opening a user file.\nS:U - Impact is host-kernel heap UAF within the same OS security authority; this is standard local privilege escalation, not a VM escape, IOMMU/DMA bypass, or sandbox boundary cross.\nC:H - rfkill_blocked() operates on a freed struct rfkill (spinlock/state); classic UAF reclaim/heap spray yields arbitrary kernel read primitives, scored Confidentiality High per UAF guidance.\nI:H - The same freed rfkill object can be reallocated and corrupted before rfkill_blocked() runs, enabling heap write and control-flow hijack primitives, scored Integrity High per UAF guidance.\nA:H - KASAN already demonstrates a use-after-free crash in rfkill_blocked/nfc_dev_up; even without full exploitation this produces a kernel oops/panic (Availability High)."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:55:23.598Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a8e03bcad52dc9afabf650fdbad84f739cec9efa"
        },
        {
          "url": "https://git.kernel.org/stable/c/f81270125b50532624400063281e6611ecd61ddf"
        },
        {
          "url": "https://git.kernel.org/stable/c/6abfaca8711803d0d7cc8c0fac1070a88509d463"
        },
        {
          "url": "https://git.kernel.org/stable/c/fbf9c4c714d3cdeb98b6a18e4d057f931cad1d81"
        },
        {
          "url": "https://git.kernel.org/stable/c/2a1b5110c95e4d49c8c3906270dfcde680a5a7be"
        },
        {
          "url": "https://git.kernel.org/stable/c/1632be63862f183cd5cf1cc094e698e6ec005dfd"
        },
        {
          "url": "https://git.kernel.org/stable/c/4a68938f43b7c2663e4c90bb9bbe29ac8b9a42a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f5d71930f41be78557f9714393179025baacd65"
        },
        {
          "url": "https://git.kernel.org/stable/c/1b0e81416a24d6e9b8c2341e22e8bf48f8b8bfc9"
        }
      ],
      "title": "NFC: NULL out the dev-\u003erfkill to prevent UAF",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49505",
    "datePublished": "2025-02-26T02:13:37.496Z",
    "dateReserved": "2025-02-26T02:08:31.586Z",
    "dateUpdated": "2026-08-05T08:55:23.598Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

EUVD-2026-344746

CVE-2022-49505 (GCVE-0-2022-49505)

Tags

Sightings

Nomenclature

Related by attack behaviour