CVE-2026-72117

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So the assignment\nis placed in the same unbroken bcm_rx_update_lock section as the content\ncomparison.\n\nAs a side effect, the RTR-request frame feature (which never reach\nbcm_send_to_user()) no longer updates rx_stamp/rx_ifindex, since only\nthe notification path needs them."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/can/bcm.c"], "versions": [{"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "lessThan": "b64f60c468d149aca22ea56bb842b9730215aaa5", "status": "affected", "versionType": "git"}, {"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "lessThan": "c8a5d7cb095d3b12bd9dcf752d6ca0ff50872ac5", "status": "affected", "versionType": "git"}, {"version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "lessThan": "4b97410f4bba18d2ee2784c8e089104f387bc27c", "status": "affected", "versionType": "git"}, {"version": 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{"affected": [{"affectedData": [{"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": "b64f60c468d149aca22ea56bb842b9730215aaa5", "status": "affected", "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "versionType": "git"}, {"lessThan": "c8a5d7cb095d3b12bd9dcf752d6ca0ff50872ac5", "status": "affected", "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "versionType": "git"}, {"lessThan": "4b97410f4bba18d2ee2784c8e089104f387bc27c", "status": "affected", "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "versionType": "git"}, {"lessThan": "5f246b96ab47523ec9b8ea870b5c567a3cb1eb1c", "status": "affected", "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "versionType": "git"}, {"lessThan": "656ff69ef235699035e57d9e1ae417e62a38aa7f", "status": "affected", "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "versionType": "git"}, {"lessThan": "136de17f38630307991c59aa7080012a99451783", "status": "affected", "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "versionType": "git"}, {"lessThan": "c312b750bb5ac3348cfc85dab25e90937bd4d251", "status": "affected", "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "versionType": "git"}, {"lessThan": "58fd6cbc8541216af1d7ed272ea7ac2b66d50fd8", "status": "affected", "version": "ffd980f976e7fd666c2e61bf8ab35107efd11828", "versionType": "git"}]}, {"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": "2.6.25"}, {"lessThan": "2.6.25", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: fix data race on rx_stamp/rx_ifindex in bcm_rx_handler()\n\nFor an rx op subscribed on all interfaces (ifindex == 0), the same op\nis registered once in the shared per-netns wildcard filter list, so\nbcm_rx_handler() can run concurrently on different CPUs for frames\narriving on different net devices.\n\nop->rx_stamp and op->rx_ifindex were written before bcm_rx_update_lock was\ntaken, allowing concurrent writers to race each other - including a torn\nstore of the 64-bit rx_stamp on 32-bit platforms.\n\nBeyond a torn store bcm_send_to_user() must report the timestamp/ifindex\nof the very same frame whose content it is delivering. So the assignment\nis placed in the same unbroken bcm_rx_update_lock section as the content\ncomparison.\n\nAs a side effect, the RTR-request frame feature (which never reach\nbcm_send_to_user()) no longer updates rx_stamp/rx_ifindex, since only\nthe notification path needs them."}], "id": "CVE-2026-72117", "lastModified": "2026-11-06T17:19:37.500", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72117", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:51:45.682684Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:21:26.123", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/136de17f38630307991c59aa7080012a99451783"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b97410f4bba18d2ee2784c8e089104f387bc27c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/58fd6cbc8541216af1d7ed272ea7ac2b66d50fd8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5f246b96ab47523ec9b8ea870b5c567a3cb1eb1c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/656ff69ef235699035e57d9e1ae417e62a38aa7f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b64f60c468d149aca22ea56bb842b9730215aaa5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c312b750bb5ac3348cfc85dab25e90937bd4d251"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c8a5d7cb095d3b12bd9dcf752d6ca0ff50872ac5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: can: bcm: fix data race on rx_stamp/rx_ifindex in bcm_rx_handler()", "id": "2516637", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516637"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-820", "details": ["A flaw was found in the Linux kernel's CAN (Controller Area Network) Broadcast Manager (BCM) module. A data race condition exists in the `bcm_rx_handler()` function where the `rx_stamp` and `rx_ifindex` values are written without proper locking. This can lead to a \"torn store\" of the 64-bit `rx_stamp` on 32-bit systems, resulting in the `bcm_send_to_user()` function reporting incorrect timestamp or interface index information for received frames. This issue primarily affects the accuracy of metadata associated with CAN frames."], "name": "CVE-2026-72117", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72117\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72117\nhttps://lore.kernel.org/linux-cve-announce/2026081527-CVE-2026-72117-a35b@gregkh/T"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ffd980f976e7fd666c2e61bf8ab35107efd11828,5f246b96ab47523ec9b8ea870b5c567a3cb1eb1c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ffd980f976e7fd666c2e61bf8ab35107efd11828,656ff69ef235699035e57d9e1ae417e62a38aa7f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ffd980f976e7fd666c2e61bf8ab35107efd11828,136de17f38630307991c59aa7080012a99451783)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ffd980f976e7fd666c2e61bf8ab35107efd11828,c312b750bb5ac3348cfc85dab25e90937bd4d251)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[ffd980f976e7fd666c2e61bf8ab35107efd11828,58fd6cbc8541216af1d7ed272ea7ac2b66d50fd8)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.25"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.25)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.148,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.101,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.42,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc4,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T09:00:06.792706+00:00", "updated": "2026-08-18T03:30:06.712747+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}