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EUVD-2026-347123

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 08:12

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.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T08:12:20.550128+00:00",
  "id": "EUVD-2026-347123"
}

CVE-2025-38604 (GCVE-0-2025-38604)

Vulnerability from cvelistv5 – Published: 2025-08-19 17:03 – Updated: 2026-08-05 12:03

Title

wifi: rtl818x: Kill URBs before clearing tx status queue

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: rtl818x: Kill URBs before clearing tx status queue In rtl8187_stop() move the call of usb_kill_anchored_urbs() before clearing b_tx_status.queue. This change prevents callbacks from using already freed skb due to anchor was not killed before freeing such skb. BUG: kernel NULL pointer dereference, address: 0000000000000080 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: Oops: 0000 [#1] SMP NOPTI CPU: 7 UID: 0 PID: 0 Comm: swapper/7 Not tainted 6.15.0 #8 PREEMPT(voluntary) Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015 RIP: 0010:ieee80211_tx_status_irqsafe+0x21/0xc0 [mac80211] Call Trace: <IRQ> rtl8187_tx_cb+0x116/0x150 [rtl8187] __usb_hcd_giveback_urb+0x9d/0x120 usb_giveback_urb_bh+0xbb/0x140 process_one_work+0x19b/0x3c0 bh_worker+0x1a7/0x210 tasklet_action+0x10/0x30 handle_softirqs+0xf0/0x340 __irq_exit_rcu+0xcd/0xf0 common_interrupt+0x85/0xa0 </IRQ> Tested on RTL8187BvE device. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Severity

7.8 (High)


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

Assigner

Linux mitre root Scorecard

References

11 references

URL	Tags
https://git.kernel.org/stable/c/e64732ebff9e24258…
https://git.kernel.org/stable/c/789415771422f4fb9…
https://git.kernel.org/stable/c/c73c773b09e313278…
https://git.kernel.org/stable/c/8c767727f331fb945…
https://git.kernel.org/stable/c/14ca6952691fa8cc9…
https://git.kernel.org/stable/c/7858a95566f4ebf59…
https://git.kernel.org/stable/c/c51a45ad9070a6d29…
https://git.kernel.org/stable/c/81cfe34d0630de4e2…
https://git.kernel.org/stable/c/16d8fd74dbfca0ea5…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c1db52b9d27ee6e15a7136e67e4a21dc916cd07f , < e64732ebff9e24258e7326f07adbe2f2b990daf8 (git) Affected: c1db52b9d27ee6e15a7136e67e4a21dc916cd07f , < 789415771422f4fb9f444044f86ecfaec55df1bd (git) Affected: c1db52b9d27ee6e15a7136e67e4a21dc916cd07f , < c73c773b09e313278f9b960303a2809b8440bac6 (git) Affected: c1db52b9d27ee6e15a7136e67e4a21dc916cd07f , < 8c767727f331fb9455b0f81daad832b5925688cb (git) Affected: c1db52b9d27ee6e15a7136e67e4a21dc916cd07f , < 14ca6952691fa8cc91e7644512e6ff24a595283f (git) Affected: c1db52b9d27ee6e15a7136e67e4a21dc916cd07f , < 7858a95566f4ebf59524666683d2dcdba3fca968 (git) Affected: c1db52b9d27ee6e15a7136e67e4a21dc916cd07f , < c51a45ad9070a6d296174fcbe5c466352836c12b (git) Affected: c1db52b9d27ee6e15a7136e67e4a21dc916cd07f , < 81cfe34d0630de4e23ae804dcc08fb6f861dc37d (git) Affected: c1db52b9d27ee6e15a7136e67e4a21dc916cd07f , < 16d8fd74dbfca0ea58645cd2fca13be10cae3cdd (git)
Linux	Linux	Affected: 2.6.29 Unaffected: 0 , < 2.6.29 (semver) Unaffected: 5.4.297 , ≤ 5.4.* (semver) Unaffected: 5.10.241 , ≤ 5.10.* (semver) Unaffected: 5.15.190 , ≤ 5.15.* (semver) Unaffected: 6.1.148 , ≤ 6.1.* (semver) Unaffected: 6.6.102 , ≤ 6.6.* (semver) Unaffected: 6.12.42 , ≤ 6.12.* (semver) Unaffected: 6.15.10 , ≤ 6.15.* (semver) Unaffected: 6.16.1 , ≤ 6.16.* (semver) Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T17:40:19.561Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e64732ebff9e24258e7326f07adbe2f2b990daf8",
              "status": "affected",
              "version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f",
              "versionType": "git"
            },
            {
              "lessThan": "789415771422f4fb9f444044f86ecfaec55df1bd",
              "status": "affected",
              "version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f",
              "versionType": "git"
            },
            {
              "lessThan": "c73c773b09e313278f9b960303a2809b8440bac6",
              "status": "affected",
              "version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f",
              "versionType": "git"
            },
            {
              "lessThan": "8c767727f331fb9455b0f81daad832b5925688cb",
              "status": "affected",
              "version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f",
              "versionType": "git"
            },
            {
              "lessThan": "14ca6952691fa8cc91e7644512e6ff24a595283f",
              "status": "affected",
              "version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f",
              "versionType": "git"
            },
            {
              "lessThan": "7858a95566f4ebf59524666683d2dcdba3fca968",
              "status": "affected",
              "version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f",
              "versionType": "git"
            },
            {
              "lessThan": "c51a45ad9070a6d296174fcbe5c466352836c12b",
              "status": "affected",
              "version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f",
              "versionType": "git"
            },
            {
              "lessThan": "81cfe34d0630de4e23ae804dcc08fb6f861dc37d",
              "status": "affected",
              "version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f",
              "versionType": "git"
            },
            {
              "lessThan": "16d8fd74dbfca0ea58645cd2fca13be10cae3cdd",
              "status": "affected",
              "version": "c1db52b9d27ee6e15a7136e67e4a21dc916cd07f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.29"
            },
            {
              "lessThan": "2.6.29",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.297",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.241",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.190",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.102",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.297",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.241",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.190",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.148",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.102",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.42",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.10",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "6.16.1",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17",
                  "versionStartIncluding": "2.6.29",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtl818x: Kill URBs before clearing tx status queue\n\nIn rtl8187_stop() move the call of usb_kill_anchored_urbs() before clearing\nb_tx_status.queue. This change prevents callbacks from using already freed\nskb due to anchor was not killed before freeing such skb.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000080\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: Oops: 0000 [#1] SMP NOPTI\n CPU: 7 UID: 0 PID: 0 Comm: swapper/7 Not tainted 6.15.0 #8 PREEMPT(voluntary)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015\n RIP: 0010:ieee80211_tx_status_irqsafe+0x21/0xc0 [mac80211]\n Call Trace:\n  \u003cIRQ\u003e\n  rtl8187_tx_cb+0x116/0x150 [rtl8187]\n  __usb_hcd_giveback_urb+0x9d/0x120\n  usb_giveback_urb_bh+0xbb/0x140\n  process_one_work+0x19b/0x3c0\n  bh_worker+0x1a7/0x210\n  tasklet_action+0x10/0x30\n  handle_softirqs+0xf0/0x340\n  __irq_exit_rcu+0xcd/0xf0\n  common_interrupt+0x85/0xa0\n  \u003c/IRQ\u003e\n\nTested on RTL8187BvE device.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."
        }
      ],
      "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 race is armed by locally bringing the wireless interface down (`ip link set wlan0 down` \u2192 `ieee80211_stop()` \u2192 `ieee80211_do_stop()` \u2192 `drv_stop()` \u2192 `rtl8187_stop()`) while local TX traffic keeps URBs in flight; no received 802.11 frame or routable packet can invoke the driver\u0027s stop callback, so an adjacent or remote peer cannot reach the vulnerable path.\nAC:L - The attacker owns both sides of the race \u2014 they flood the TX path to keep more than five entries in `b_tx_status.queue` (the exact precondition for the racing `skb_dequeue()` in `rtl8187_tx_cb()`\u0027s drain loop) and then issue the interface-down, repeating the up/down cycle indefinitely until the window between the drain loop and `usb_kill_anchored_urbs()` is hit; `CONFIG_RTL8187` is a stock distro module, so no rare configuration is required.\nPR:L - Bringing the interface down requires CAP_NET_ADMIN over the network namespace owning the netdev, which an unprivileged user holds via `unshare -Ur` once the wiphy has been delegated into a container netns \u2014 the same reasoning applied to mac80211 configuration paths in CVE-2025-38642; on desktop deployments polkit additionally lets an active unprivileged session toggle WiFi through NetworkManager.\nUI:N - The attacker performs both the traffic generation and the interface down/up cycle themselves; no victim needs to open a file, mount anything, or take any other action.\nS:U - The freed/NULL sk_buff is dereferenced in the host kernel\u0027s own driver and mac80211 context, with no VM, IOMMU, or sandbox boundary crossed.\nC:H - The fix exists to stop URB completion callbacks from consuming skbs already released by `dev_kfree_skb_any()`; a freed `struct sk_buff` reallocated by a concurrent attacker-controlled allocation supplies the `ieee80211_hw *` read from `info-\u003erate_driver_data[0]` and is then relinked into mac80211\u0027s status queues, yielding a controlled kernel-pointer dereference and read primitive.\nI:H - The same use-after-free window lets a sprayed replacement object drive `hw-\u003epriv` and the subsequent `ieee80211_tx_status_irqsafe()` queueing, and skbs re-queued by `rtl8187_tx_cb()` after the drain are later freed again, giving double-free and heap-corruption primitives exploitable for control-flow hijack.\nA:H - The reproduced impact on real RTL8187BvE hardware is a kernel oops from `ieee80211_tx_status_irqsafe()` dereferencing a NULL skb inside the USB giveback BH, which kills the softirq worker and wedges the WLAN device, and becomes a full panic on systems with `panic_on_oops`; the attacker can re-trigger it at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:03:25.920Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e64732ebff9e24258e7326f07adbe2f2b990daf8"
        },
        {
          "url": "https://git.kernel.org/stable/c/789415771422f4fb9f444044f86ecfaec55df1bd"
        },
        {
          "url": "https://git.kernel.org/stable/c/c73c773b09e313278f9b960303a2809b8440bac6"
        },
        {
          "url": "https://git.kernel.org/stable/c/8c767727f331fb9455b0f81daad832b5925688cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/14ca6952691fa8cc91e7644512e6ff24a595283f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7858a95566f4ebf59524666683d2dcdba3fca968"
        },
        {
          "url": "https://git.kernel.org/stable/c/c51a45ad9070a6d296174fcbe5c466352836c12b"
        },
        {
          "url": "https://git.kernel.org/stable/c/81cfe34d0630de4e23ae804dcc08fb6f861dc37d"
        },
        {
          "url": "https://git.kernel.org/stable/c/16d8fd74dbfca0ea58645cd2fca13be10cae3cdd"
        }
      ],
      "title": "wifi: rtl818x: Kill URBs before clearing tx status queue",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38604",
    "datePublished": "2025-08-19T17:03:43.358Z",
    "dateReserved": "2025-04-16T04:51:24.028Z",
    "dateUpdated": "2026-08-05T12:03:25.920Z",
    "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.

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EUVD-2026-347123

CVE-2025-38604 (GCVE-0-2025-38604)

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Nomenclature

Related by attack behaviour