« Back to list

CVE-2026-72120

Status: ReceivedHigh (7.8)—

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().

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vulnerabilidad local en kernel Linux (AV:L, PR:L) sin interacción del usuario. Afecta al módulo CAN-BCM con uso incorrecto de RCU, permitiendo corrupción de memoria y denegación de servicio remota tras escalada de privilegios locales.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Threat Intelligence ProgramRestrict File and Directory PermissionsRemote Data StorageFilter Network TrafficExecution PreventionEncrypt Sensitive Information

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux KernelAI

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-72120",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.8,
          "attackVector": "LOCAL",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 1.8
      }
    ]
  },
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "659701c0b954ccdb4a916a4ad59bbc16e726d42c",
              "lessThan": "8357255e56dc1aaa437e3c53ee9385de984e0d57",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "0622846db728a5332b917c797c733e202c4620ae",
              "lessThan": "8e1c7257c81577130f5ce90f69b2a2c3ce63f957",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "6d7d458c41b98a5c1670cbd36f2923c37de51cf5",
              "lessThan": "eb1c26eab4d1f0b4450439b4b88c3e73faf1da98",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "1f912f8484e9c4396378c39460bbea0af681f319",
              "lessThan": "f53bdab85e64eb57d6899a30d1307fd5a3639cc7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "63567ecd99a24495208dc860d50fb17440043006",
              "lessThan": "4e22e8b505f877573bbdfdbcb680babad9b2f7a1",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "dac5e6249159ac255dad9781793dbe5908ac9ddb",
              "lessThan": "b06a4a397ac826603f39875cb7c7819a41365196",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "dac5e6249159ac255dad9781793dbe5908ac9ddb",
              "lessThan": "30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "dac5e6249159ac255dad9781793dbe5908ac9ddb",
              "lessThan": "7b2c3eabc4dafc062a25e10711154f2107526a78",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "19f553a1ddf260da6570ed8f8d91a8c87f49b63a",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "7c9db92d5f0eadca30884af75c53d601edc512ee",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "5.10.238",
              "lessThan": "5.10.261",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.15.185",
              "lessThan": "5.15.212",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.1.141",
              "lessThan": "6.1.178",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.6.93",
              "lessThan": "6.6.145",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.12.31",
              "lessThan": "6.12.97",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.4.294",
              "lessThan": "5.5",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "6.14.9",
              "lessThan": "6.15",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "net/can/bcm.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.15"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.15",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "net/can/bcm.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-08-15T06:21:26.507",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/30f7bb922cb7e7f072a56c7cb7a5efccd2ceca1d",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4e22e8b505f877573bbdfdbcb680babad9b2f7a1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/7b2c3eabc4dafc062a25e10711154f2107526a78",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8357255e56dc1aaa437e3c53ee9385de984e0d57",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8e1c7257c81577130f5ce90f69b2a2c3ce63f957",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b06a4a397ac826603f39875cb7c7819a41365196",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/eb1c26eab4d1f0b4450439b4b88c3e73faf1da98",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f53bdab85e64eb57d6899a30d1307fd5a3639cc7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "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's under rcu_read_lock().\n\nTo cover all initial settings of the bcm_op's 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->tx_ops/bo->rx_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()."
    }
  ],
  "lastModified": "2026-08-17T06:18:11.367",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}