CVE-2026-72119

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/12ce799f7ab1e05bd8fbf79e46f403bfe5597ebc
https://git.kernel.org/stable/c/337f966c00662d81ad82cf5a4bbb150b2e32c0d4
https://git.kernel.org/stable/c/37917e432e50b7de2b64230974380132a30f7270
https://git.kernel.org/stable/c/52f06e7603780de100233713ddaf971d422e10ef
https://git.kernel.org/stable/c/63422347b4c782f429748b2a09cd3cf3b77e6abd
https://git.kernel.org/stable/c/972fd66bb08fdef1090abe43196ca8da07216d13
https://git.kernel.org/stable/c/a538b072ee074c9b41b9d9c15a6861a963e30755
https://git.kernel.org/stable/c/bd46f55dec608daa44b45dcf3328517630ad8e40

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-15 06:21

Updated : 2026-08-19 17:20

NVD link : CVE-2026-72119

Mitre link : CVE-2026-72119

CVE.ORG link : CVE-2026-72119

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-72119", "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": "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"}], "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": "5.10.265", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.216", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.183", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.148", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.101", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.42", "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": "2026-08-15T06:21:26.363", "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"}], "vulnStatus": "Received", "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()'d\nbuffer and validate it there, mirroring the approach already used in\nbcm_rx_setup(). Only copy the validated data into op->frames while\nholding op->bcm_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->bcm_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."}], "lastModified": "2026-08-19T17:20:58.903", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}