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

Vulnerability from cvelistv5 – Published: 2026-08-15 05:52 – Updated: 2026-08-19 16:36
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
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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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          "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."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/a538b072ee074c9b41b9d9c15a6861a963e30755"
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          "url": "https://git.kernel.org/stable/c/63422347b4c782f429748b2a09cd3cf3b77e6abd"
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        {
          "url": "https://git.kernel.org/stable/c/12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc"
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      "title": "can: bcm: extend bcm_tx_lock usage for data and timer updates",
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    "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"
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      "cve": "CVE-2026-72119",
      "date": "2026-09-04",
      "epss": "0.00164",
      "percentile": "0.05892"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-72119\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T06:21:26.363\",\"lastModified\":\"2026-08-19T17:20:58.903\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/can/bcm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"7595de7bc56e0e52b74e56c90f7e247bf626d628\",\"lessThan\":\"a538b072ee074c9b41b9d9c15a6861a963e30755\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"fbd8fdc2b218e979cfe422b139b8f74c12419d1f\",\"lessThan\":\"63422347b4c782f429748b2a09cd3cf3b77e6abd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a437b86ac5a9893c902f30ef66815bf13587bf6\",\"lessThan\":\"37917e432e50b7de2b64230974380132a30f7270\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"76c84c3728178b2d38d5604e399dfe8b0752645e\",\"lessThan\":\"52f06e7603780de100233713ddaf971d422e10ef\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"cc55dd28c20a6611e30596019b3b2f636819a4c0\",\"lessThan\":\"972fd66bb08fdef1090abe43196ca8da07216d13\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7\",\"lessThan\":\"bd46f55dec608daa44b45dcf3328517630ad8e40\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7\",\"lessThan\":\"337f966c00662d81ad82cf5a4bbb150b2e32c0d4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c2aba69d0c36a496ab4f2e81e9c2b271f2693fd7\",\"lessThan\":\"12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8f1c022541bf5a923c8d6fa483112c15250f30a4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"c4e8a172501e677ebd8ea9d9161d97dc4df56fbd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.238\",\"lessThan\":\"5.10.265\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.185\",\"lessThan\":\"5.15.216\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.141\",\"lessThan\":\"6.1.183\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.93\",\"lessThan\":\"6.6.148\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.31\",\"lessThan\":\"6.12.101\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.294\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.14.9\",\"lessThan\":\"6.15\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/can/bcm.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/337f966c00662d81ad82cf5a4bbb150b2e32c0d4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/37917e432e50b7de2b64230974380132a30f7270\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/52f06e7603780de100233713ddaf971d422e10ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/63422347b4c782f429748b2a09cd3cf3b77e6abd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/972fd66bb08fdef1090abe43196ca8da07216d13\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a538b072ee074c9b41b9d9c15a6861a963e30755\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd46f55dec608daa44b45dcf3328517630ad8e40\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T22:48:50+00:00",
      "cve": "CVE-2026-72119",
      "id": "CVE-2026-72119",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "62",
      "product_status:known_not_affected": "212",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: can: bcm: extend bcm_tx_lock usage for data and timer updates",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72119.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Detection rules are retrieved from Rulezet.