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EUVD-2026-353942

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 08:25

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": "2026-10-02T08:25:24.298188+00:00",
  "id": "EUVD-2026-353942"
}

CVE-2026-72120 (GCVE-0-2026-72120)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:52 – Updated: 2026-08-17 05:40

Title

can: bcm: add missing rcu list annotations and operations

Summary

In the Linux kernel, the following vulnerability has been resolved: can: bcm: add missing rcu list annotations and operations sashiko-bot remarked the missing use of list_add_rcu() in bcm_[rx|tx]_setup() to have a proper initialized bcm_op structure when bcm_proc_show() traverses the bcm_op's under rcu_read_lock(). To cover all initial settings of the bcm_op's the list_add_rcu() calls are moved to the end of the setup code. While at it, also fix the mirroring removal side: bcm_release() called bcm_remove_op() - which frees the op via call_rcu() - on ops that were still linked in bo->tx_ops/bo->rx_ops, without list_del_rcu() first. Unlink each op with list_del_rcu() before handing it to bcm_remove_op(), matching the existing pattern in bcm_delete_tx_op()/bcm_delete_rx_op().

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

8 references

URL	Tags
https://git.kernel.org/stable/c/8357255e56dc1aaa4…
https://git.kernel.org/stable/c/8e1c7257c81577130…
https://git.kernel.org/stable/c/eb1c26eab4d1f0b44…
https://git.kernel.org/stable/c/f53bdab85e64eb57d…
https://git.kernel.org/stable/c/4e22e8b505f877573…
https://git.kernel.org/stable/c/b06a4a397ac826603…
https://git.kernel.org/stable/c/30f7bb922cb7e7f07…
https://git.kernel.org/stable/c/7b2c3eabc4dafc062…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 659701c0b954ccdb4a916a4ad59bbc16e726d42c , < 8357255e56dc1aaa437e3c53ee9385de984e0d57 (git) Affected: 0622846db728a5332b917c797c733e202c4620ae , < 8e1c7257c81577130f5ce90f69b2a2c3ce63f957 (git) Affected: 6d7d458c41b98a5c1670cbd36f2923c37de51cf5 , < eb1c26eab4d1f0b4450439b4b88c3e73faf1da98 (git) Affected: 1f912f8484e9c4396378c39460bbea0af681f319 , < f53bdab85e64eb57d6899a30d1307fd5a3639cc7 (git) Affected: 63567ecd99a24495208dc860d50fb17440043006 , < 4e22e8b505f877573bbdfdbcb680babad9b2f7a1 (git) Affected: dac5e6249159ac255dad9781793dbe5908ac9ddb , < b06a4a397ac826603f39875cb7c7819a41365196 (git) Affected: dac5e6249159ac255dad9781793dbe5908ac9ddb , < 30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d (git) Affected: dac5e6249159ac255dad9781793dbe5908ac9ddb , < 7b2c3eabc4dafc062a25e10711154f2107526a78 (git) Affected: 19f553a1ddf260da6570ed8f8d91a8c87f49b63a (git) Affected: 7c9db92d5f0eadca30884af75c53d601edc512ee (git) Affected: 5.10.238 , < 5.10.261 (semver) Affected: 5.15.185 , < 5.15.212 (semver) Affected: 6.1.141 , < 6.1.178 (semver) Affected: 6.6.93 , < 6.6.145 (semver) Affected: 6.12.31 , < 6.12.97 (semver) Affected: 5.4.294 , < 5.5 (semver) Affected: 6.14.9 , < 6.15 (semver)
Linux	Linux	Affected: 6.15 Unaffected: 0 , < 6.15 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/can/bcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "8357255e56dc1aaa437e3c53ee9385de984e0d57",
              "status": "affected",
              "version": "659701c0b954ccdb4a916a4ad59bbc16e726d42c",
              "versionType": "git"
            },
            {
              "lessThan": "8e1c7257c81577130f5ce90f69b2a2c3ce63f957",
              "status": "affected",
              "version": "0622846db728a5332b917c797c733e202c4620ae",
              "versionType": "git"
            },
            {
              "lessThan": "eb1c26eab4d1f0b4450439b4b88c3e73faf1da98",
              "status": "affected",
              "version": "6d7d458c41b98a5c1670cbd36f2923c37de51cf5",
              "versionType": "git"
            },
            {
              "lessThan": "f53bdab85e64eb57d6899a30d1307fd5a3639cc7",
              "status": "affected",
              "version": "1f912f8484e9c4396378c39460bbea0af681f319",
              "versionType": "git"
            },
            {
              "lessThan": "4e22e8b505f877573bbdfdbcb680babad9b2f7a1",
              "status": "affected",
              "version": "63567ecd99a24495208dc860d50fb17440043006",
              "versionType": "git"
            },
            {
              "lessThan": "b06a4a397ac826603f39875cb7c7819a41365196",
              "status": "affected",
              "version": "dac5e6249159ac255dad9781793dbe5908ac9ddb",
              "versionType": "git"
            },
            {
              "lessThan": "30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d",
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              "version": "dac5e6249159ac255dad9781793dbe5908ac9ddb",
              "versionType": "git"
            },
            {
              "lessThan": "7b2c3eabc4dafc062a25e10711154f2107526a78",
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              "version": "dac5e6249159ac255dad9781793dbe5908ac9ddb",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "19f553a1ddf260da6570ed8f8d91a8c87f49b63a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7c9db92d5f0eadca30884af75c53d601edc512ee",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.261",
              "status": "affected",
              "version": "5.10.238",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.212",
              "status": "affected",
              "version": "5.15.185",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.178",
              "status": "affected",
              "version": "6.1.141",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.145",
              "status": "affected",
              "version": "6.6.93",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.97",
              "status": "affected",
              "version": "6.12.31",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.294",
              "versionType": "semver"
            },
            {
              "lessThan": "6.15",
              "status": "affected",
              "version": "6.14.9",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/can/bcm.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "lessThan": "6.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "5.10.238",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "5.15.185",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "6.1.141",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "6.6.93",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "6.12.31",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.15",
                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "5.4.294",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.14.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: add missing rcu list annotations and operations\n\nsashiko-bot remarked the missing use of list_add_rcu() in\nbcm_[rx|tx]_setup() to have a proper initialized bcm_op structure\nwhen bcm_proc_show() traverses the bcm_op\u0027s under rcu_read_lock().\n\nTo cover all initial settings of the bcm_op\u0027s the list_add_rcu() calls\nare moved to the end of the setup code.\n\nWhile at it, also fix the mirroring removal side: bcm_release() called\nbcm_remove_op() - which frees the op via call_rcu() - on ops that were\nstill linked in bo-\u003etx_ops/bo-\u003erx_ops, without list_del_rcu() first.\nUnlink each op with list_del_rcu() before handing it to bcm_remove_op(),\nmatching the existing pattern in bcm_delete_tx_op()/bcm_delete_rx_op()."
        }
      ],
      "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 - Exploitation requires local syscalls (socket/connect/sendmsg/close on PF_CAN/CAN_BCM) and/or reading /proc/net/can-bcm/\u003cinode\u003e; the bug is in RCU list management and procfs traversal, not in remote CAN frame reception.\nAC:L - The attacker controls both sides of the race\u2014concurrent TX_SETUP/RX_SETUP or socket close while repeatedly reading the world-readable proc entry\u2014so the UAF in bcm_proc_show is reliably triggerable without external timing luck.\nPR:L - PF_CAN CAN_BCM sockets are created and connected without capability checks; RX_SETUP works with ifindex 0 (no bound CAN device), so any unprivileged local user can create ops and race procfs reads on automotive, industrial, and embedded systems with CONFIG_CAN_BCM.\nUI:N - No victim interaction is required; the attacker drives the full exploit sequence (socket setup, opcode installation, proc reads, and socket teardown) from their own local process threads.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security domain; impact is local privilege escalation or crash, not crossing a VM, container, or IOMMU security boundary.\nC:H - bcm_proc_show dereferences bcm_op fields (can_id, flags, timers, counters) from list entries that may already be freed via call_rcu in bcm_remove_op, enabling kernel heap memory disclosure and further exploitation primitives.\nI:H - Freed bcm_op structures are kmalloc heap objects containing list_head links, sock pointers, and hrtimer state; UAF combined with heap spraying can yield arbitrary kernel writes and control-flow hijack for privilege escalation.\nA:H - Concurrent procfs traversal of tx_ops/rx_ops lists containing stale pointers to RCU-freed bcm_op objects can cause kernel oops/panic during list walking or field access, and UAF exploitation attempts can also crash the system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:40:33.370Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/8357255e56dc1aaa437e3c53ee9385de984e0d57"
        },
        {
          "url": "https://git.kernel.org/stable/c/8e1c7257c81577130f5ce90f69b2a2c3ce63f957"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb1c26eab4d1f0b4450439b4b88c3e73faf1da98"
        },
        {
          "url": "https://git.kernel.org/stable/c/f53bdab85e64eb57d6899a30d1307fd5a3639cc7"
        },
        {
          "url": "https://git.kernel.org/stable/c/4e22e8b505f877573bbdfdbcb680babad9b2f7a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/b06a4a397ac826603f39875cb7c7819a41365196"
        },
        {
          "url": "https://git.kernel.org/stable/c/30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d"
        },
        {
          "url": "https://git.kernel.org/stable/c/7b2c3eabc4dafc062a25e10711154f2107526a78"
        }
      ],
      "title": "can: bcm: add missing rcu list annotations and operations",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72120",
    "datePublished": "2026-08-15T05:52:59.226Z",
    "dateReserved": "2026-08-09T03:40:39.907Z",
    "dateUpdated": "2026-08-17T05:40:33.370Z",
    "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.
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EUVD-2026-353942

CVE-2026-72120 (GCVE-0-2026-72120)

Tags

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Nomenclature

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