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EUVD-2026-356358

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 08:28

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": "2026-10-02T08:28:29.895193+00:00",
  "id": "EUVD-2026-356358"
}

CVE-2026-72119 (GCVE-0-2026-72119)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:52 – Updated: 2026-08-19 16:36

Title

can: bcm: extend bcm_tx_lock usage for data and timer updates

Summary

In the Linux kernel, the following vulnerability has been resolved: can: bcm: extend bcm_tx_lock usage for data and timer updates Stage new CAN frame content for an existing tx op into a kmalloc()'d buffer and validate it there, mirroring the approach already used in bcm_rx_setup(). Only copy the validated data into op->frames while holding op->bcm_tx_lock, so bcm_can_tx() and bcm_tx_timeout_handler() can no longer observe a partially updated or unvalidated frame. Add a missing error path for memcpy_from_msg() when copying CAN frame data from userspace. Also move the kt_ival1/kt_ival2/ival1/ival2 updates in bcm_tx_setup() under op->bcm_tx_lock, and read kt_ival1/kt_ival2/count under the same lock in bcm_tx_set_expiry() and bcm_tx_timeout_handler(), closing the torn 64-bit ktime_t read on 32-bit platforms.

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/a538b072ee074c9b4…
https://git.kernel.org/stable/c/63422347b4c782f42…
https://git.kernel.org/stable/c/37917e432e50b7de2…
https://git.kernel.org/stable/c/52f06e7603780de10…
https://git.kernel.org/stable/c/972fd66bb08fdef10…
https://git.kernel.org/stable/c/bd46f55dec608daa4…
https://git.kernel.org/stable/c/337f966c00662d81a…
https://git.kernel.org/stable/c/12ce799f7ab1e05bd…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7595de7bc56e0e52b74e56c90f7e247bf626d628 , < a538b072ee074c9b41b9d9c15a6861a963e30755 (git) Affected: fbd8fdc2b218e979cfe422b139b8f74c12419d1f , < 63422347b4c782f429748b2a09cd3cf3b77e6abd (git) Affected: 2a437b86ac5a9893c902f30ef66815bf13587bf6 , < 37917e432e50b7de2b64230974380132a30f7270 (git) Affected: 76c84c3728178b2d38d5604e399dfe8b0752645e , < 52f06e7603780de100233713ddaf971d422e10ef (git) Affected: cc55dd28c20a6611e30596019b3b2f636819a4c0 , < 972fd66bb08fdef1090abe43196ca8da07216d13 (git) Affected: c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 , < bd46f55dec608daa44b45dcf3328517630ad8e40 (git) Affected: c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 , < 337f966c00662d81ad82cf5a4bbb150b2e32c0d4 (git) Affected: c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7 , < 12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc (git) Affected: 8f1c022541bf5a923c8d6fa483112c15250f30a4 (git) Affected: c4e8a172501e677ebd8ea9d9161d97dc4df56fbd (git) Affected: 5.10.238 , < 5.10.265 (semver) Affected: 5.15.185 , < 5.15.216 (semver) Affected: 6.1.141 , < 6.1.183 (semver) Affected: 6.6.93 , < 6.6.148 (semver) Affected: 6.12.31 , < 6.12.101 (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: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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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": "a538b072ee074c9b41b9d9c15a6861a963e30755",
              "status": "affected",
              "version": "7595de7bc56e0e52b74e56c90f7e247bf626d628",
              "versionType": "git"
            },
            {
              "lessThan": "63422347b4c782f429748b2a09cd3cf3b77e6abd",
              "status": "affected",
              "version": "fbd8fdc2b218e979cfe422b139b8f74c12419d1f",
              "versionType": "git"
            },
            {
              "lessThan": "37917e432e50b7de2b64230974380132a30f7270",
              "status": "affected",
              "version": "2a437b86ac5a9893c902f30ef66815bf13587bf6",
              "versionType": "git"
            },
            {
              "lessThan": "52f06e7603780de100233713ddaf971d422e10ef",
              "status": "affected",
              "version": "76c84c3728178b2d38d5604e399dfe8b0752645e",
              "versionType": "git"
            },
            {
              "lessThan": "972fd66bb08fdef1090abe43196ca8da07216d13",
              "status": "affected",
              "version": "cc55dd28c20a6611e30596019b3b2f636819a4c0",
              "versionType": "git"
            },
            {
              "lessThan": "bd46f55dec608daa44b45dcf3328517630ad8e40",
              "status": "affected",
              "version": "c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7",
              "versionType": "git"
            },
            {
              "lessThan": "337f966c00662d81ad82cf5a4bbb150b2e32c0d4",
              "status": "affected",
              "version": "c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7",
              "versionType": "git"
            },
            {
              "lessThan": "12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc",
              "status": "affected",
              "version": "c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8f1c022541bf5a923c8d6fa483112c15250f30a4",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c4e8a172501e677ebd8ea9d9161d97dc4df56fbd",
              "versionType": "git"
            },
            {
              "lessThan": "5.10.265",
              "status": "affected",
              "version": "5.10.238",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.216",
              "status": "affected",
              "version": "5.15.185",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.183",
              "status": "affected",
              "version": "6.1.141",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.148",
              "status": "affected",
              "version": "6.6.93",
              "versionType": "semver"
            },
            {
              "lessThan": "6.12.101",
              "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": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "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": "5.10.265",
                  "versionStartIncluding": "5.10.238",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "5.15.185",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "6.1.141",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "6.6.93",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "6.12.31",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "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
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "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: extend bcm_tx_lock usage for data and timer updates\n\nStage new CAN frame content for an existing tx op into a kmalloc()\u0027d\nbuffer and validate it there, mirroring the approach already used in\nbcm_rx_setup(). Only copy the validated data into op-\u003eframes while\nholding op-\u003ebcm_tx_lock, so bcm_can_tx() and bcm_tx_timeout_handler()\ncan no longer observe a partially updated or unvalidated frame.\n\nAdd a missing error path for memcpy_from_msg() when copying CAN frame\ndata from userspace.\n\nAlso move the kt_ival1/kt_ival2/ival1/ival2 updates in bcm_tx_setup()\nunder op-\u003ebcm_tx_lock, and read kt_ival1/kt_ival2/count under the same\nlock in bcm_tx_set_expiry() and bcm_tx_timeout_handler(), closing the\ntorn 64-bit ktime_t read on 32-bit platforms."
        }
      ],
      "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 bug is reached only through PF_CAN/CAN_BCM socket sendmsg() TX_SETUP updates racing hrtimer-driven bcm_can_tx(); it is not triggered by remote network services or CAN bus traffic alone.\nAC:L - The attacker controls both sides of the race by creating cyclic TX ops with STARTTIMER/SETTIMER and repeatedly issuing TX_SETUP while the softirq hrtimer fires, making the window reliably winnable without external timing luck.\nPR:L - bcm_sendmsg()/bcm_connect() enforce no capability checks; any local user with access to a CAN interface (including vcan created with CAP_NET_ADMIN inside an unprivileged user namespace) can open BCM sockets and drive TX_SETUP.\nUI:N - Exploitation requires only the attacker opening a BCM socket and sending TX_SETUP messages; no victim interaction such as mounting filesystems or opening files is needed.\nS:U - Impact is confined to kernel memory/state corruption and local privilege effects on the host running CAN BCM; it does not cross a VM, container, or IOMMU security boundary by itself.\nC:H - Racing updates can let bcm_can_tx() transmit partially updated or unvalidated frames (e.g., len\u003e64) before bcm_tx_setup() rejects them, and many CAN driver xmit paths memcpy(cf-\u003edata, cf-\u003elen) trusting len, causing kernel out-of-bounds reads.\nI:H - Concurrent unsynchronized writes to op-\u003eframes, flags, count, and ktime_t timer fields corrupt shared in-kernel BCM state that directly feeds skb construction and driver transmission, providing attacker-influenced memory corruption primitives.\nA:H - Observing torn/unvalidated frames in bcm_can_tx() during active timers can trigger kernel WARN/Oops/panic via out-of-bounds accesses in CAN drivers, and torn ktime_t/count reads can disrupt cyclic transmission causing denial of service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:36:13.917Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a538b072ee074c9b41b9d9c15a6861a963e30755"
        },
        {
          "url": "https://git.kernel.org/stable/c/63422347b4c782f429748b2a09cd3cf3b77e6abd"
        },
        {
          "url": "https://git.kernel.org/stable/c/37917e432e50b7de2b64230974380132a30f7270"
        },
        {
          "url": "https://git.kernel.org/stable/c/52f06e7603780de100233713ddaf971d422e10ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/972fd66bb08fdef1090abe43196ca8da07216d13"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd46f55dec608daa44b45dcf3328517630ad8e40"
        },
        {
          "url": "https://git.kernel.org/stable/c/337f966c00662d81ad82cf5a4bbb150b2e32c0d4"
        },
        {
          "url": "https://git.kernel.org/stable/c/12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc"
        }
      ],
      "title": "can: bcm: extend bcm_tx_lock usage for data and timer updates",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72119",
    "datePublished": "2026-08-15T05:52:58.479Z",
    "dateReserved": "2026-08-09T03:40:39.906Z",
    "dateUpdated": "2026-08-19T16:36:13.917Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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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.

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EUVD-2026-356358

CVE-2026-72119 (GCVE-0-2026-72119)

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Nomenclature

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