{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72125", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.907Z", "datePublished": "2026-08-15T05:53:02.905Z", "dateUpdated": "2026-08-17T05:40:38.905Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:40:38.905Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: fix use-after-free race with concurrent NETDEV_UNREGISTER\n\nisotp_release() looked up the bound network device via dev_get_by_index()\nusing the stored ifindex. During device unregistration the device is\nunlisted from the ifindex hash before the NETDEV_UNREGISTER notifier\nchain runs, so a concurrent isotp_release() could find no device, skip\ncan_rx_unregister() entirely, and still proceed to free the socket.\nSince isotp_release() had already removed itself from the isotp\nnotifier list at that point, isotp_notify() would never get a chance to\nclean up either, leaving a stale CAN filter that keeps pointing at the\nfreed socket.\n\nFix this the same way raw.c already does: hold a tracked reference to\nthe bound net_device in the socket (so->dev/so->dev_tracker) from\nbind() onward instead of re-resolving it from the ifindex, and\nserialize bind()/release() with rtnl_lock() so that so->dev is always\nconsistent with what the NETDEV_UNREGISTER notifier sees. so->dev\nstays valid regardless of ifindex-hash unlisting, and is only ever\ncleared by whichever of isotp_release()/isotp_notify() gets there\nfirst, so the filter is always removed exactly once.\n\nisotp_bind() now rejects a (re)bind with -EAGAIN while so->[tx|rx].state\nisn't ISOTP_IDLE yet, so a timer left running by a prior\nNETDEV_UNREGISTER can't act on a newly bound so->ifindex. Both checks\nshare the same lock_sock() section, so there is no window in which a\nconcurrent isotp_notify() clearing so->bound could be missed."}], "metrics": [{"cvssV3_1": {"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"}, "scenarios": [{"lang": "en", "value": "AV:L - Exploitation requires local AF_CAN ISO-TP socket operations (socket/bind/close) racing NETDEV_UNREGISTER on the bound CAN interface; stale-filter UAF is triggered via local frame injection or an existing bound interface, not a remote IP/network service.\nAC:L - The attacker controls both sides of the race by concurrently closing the ISO-TP socket and unregistering the bound CAN device (e.g., vcan create/delete with CAP_NET_ADMIN in a user namespace), and can retry until the stale RX filter is left on a freed socket.\nPR:L - No init-namespace root is required: any local user can open CAN_ISOTP sockets, and CAP_NET_ADMIN obtainable in user namespaces suffices to create/delete vcan and drive the unregister path used in automotive/embedded ISO-TP (UDS) deployments.\nUI:N - No victim interaction is needed; the use-after-free is triggered by the attacker's own concurrent close()/NETDEV_UNREGISTER operations and subsequent CAN frames sent to the bound IDs.\nS:U - Impact is kernel heap corruption and potential privilege escalation within the same OS security boundary; it does not inherently cross VM, container, or IOMMU isolation boundaries.\nC:H - A stale can_rx filter keeps calling isotp_rcv()/isotp_rcv_echo() with a freed isotp_sock, enabling reads of reallocated slab contents through socket state, sock_queue_rcv_skb(), and protocol parsing on attacker-influenced memory.\nI:H - The UAF path performs extensive writes to freed socket state (RX/TX buffers, timers, generation counters) and can emit CAN traffic, providing primitives for heap shaping and control-flow hijack rather than a crash-only fault.\nA:H - Use-after-free in softirq CAN receive callbacks commonly causes kernel oops/panic from dereferencing or writing freed isotp_sock/timer state, even before reliable exploitation."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/can/isotp.c"], "versions": [{"version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "lessThan": "0b811c4bbe3ec9ad611e90a540fe8b51b3bb8a96", "status": "affected", "versionType": "git"}, {"version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "lessThan": "43884dc7963beef2328f507f4fe680bdc173eb80", "status": "affected", "versionType": "git"}, {"version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "lessThan": "7bef39ba76eb7307ed22a50329e0f5776dbeda58", "status": "affected", "versionType": "git"}, {"version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "lessThan": "e442b62ba5a7756c17e05a77b32cdd085a2b6138", "status": "affected", "versionType": "git"}, {"version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "lessThan": "20bab8b88baac140ca3701116e1d486c7f51e311", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/can/isotp.c"], "versions": [{"version": "5.10", "status": "affected"}, {"version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.148", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.101", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0b811c4bbe3ec9ad611e90a540fe8b51b3bb8a96"}, {"url": "https://git.kernel.org/stable/c/43884dc7963beef2328f507f4fe680bdc173eb80"}, {"url": "https://git.kernel.org/stable/c/7bef39ba76eb7307ed22a50329e0f5776dbeda58"}, {"url": "https://git.kernel.org/stable/c/e442b62ba5a7756c17e05a77b32cdd085a2b6138"}, {"url": "https://git.kernel.org/stable/c/20bab8b88baac140ca3701116e1d486c7f51e311"}], "title": "can: isotp: fix use-after-free race with concurrent NETDEV_UNREGISTER", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/can/isotp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "0b811c4bbe3ec9ad611e90a540fe8b51b3bb8a96", "status": "affected", "version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "versionType": "git"}, {"lessThan": "43884dc7963beef2328f507f4fe680bdc173eb80", "status": "affected", "version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "versionType": "git"}, {"lessThan": "7bef39ba76eb7307ed22a50329e0f5776dbeda58", "status": "affected", "version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "versionType": "git"}, {"lessThan": "e442b62ba5a7756c17e05a77b32cdd085a2b6138", "status": "affected", "version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "versionType": "git"}, {"lessThan": "20bab8b88baac140ca3701116e1d486c7f51e311", "status": "affected", "version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/can/isotp.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.10"}, {"lessThan": "5.10", "status": "unaffected", "version": "0", "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": "6.18.40", "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: isotp: fix use-after-free race with concurrent NETDEV_UNREGISTER\n\nisotp_release() looked up the bound network device via dev_get_by_index()\nusing the stored ifindex. During device unregistration the device is\nunlisted from the ifindex hash before the NETDEV_UNREGISTER notifier\nchain runs, so a concurrent isotp_release() could find no device, skip\ncan_rx_unregister() entirely, and still proceed to free the socket.\nSince isotp_release() had already removed itself from the isotp\nnotifier list at that point, isotp_notify() would never get a chance to\nclean up either, leaving a stale CAN filter that keeps pointing at the\nfreed socket.\n\nFix this the same way raw.c already does: hold a tracked reference to\nthe bound net_device in the socket (so->dev/so->dev_tracker) from\nbind() onward instead of re-resolving it from the ifindex, and\nserialize bind()/release() with rtnl_lock() so that so->dev is always\nconsistent with what the NETDEV_UNREGISTER notifier sees. so->dev\nstays valid regardless of ifindex-hash unlisting, and is only ever\ncleared by whichever of isotp_release()/isotp_notify() gets there\nfirst, so the filter is always removed exactly once.\n\nisotp_bind() now rejects a (re)bind with -EAGAIN while so->[tx|rx].state\nisn't ISOTP_IDLE yet, so a timer left running by a prior\nNETDEV_UNREGISTER can't act on a newly bound so->ifindex. Both checks\nshare the same lock_sock() section, so there is no window in which a\nconcurrent isotp_notify() clearing so->bound could be missed."}], "id": "CVE-2026-72125", "lastModified": "2026-08-17T06:18:12.087", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:21:29.840", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0b811c4bbe3ec9ad611e90a540fe8b51b3bb8a96"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/20bab8b88baac140ca3701116e1d486c7f51e311"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/43884dc7963beef2328f507f4fe680bdc173eb80"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7bef39ba76eb7307ed22a50329e0f5776dbeda58"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e442b62ba5a7756c17e05a77b32cdd085a2b6138"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: can: isotp: fix use-after-free race with concurrent NETDEV_UNREGISTER", "id": "2516725", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516725"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's Controller Area Network (CAN) ISO-TP protocol. A memory corruption vulnerability, specifically a use-after-free race condition, can occur during the unregistration of a network device. This happens when the system attempts to free a socket while a CAN filter still references it. A local attacker could potentially exploit this to cause a system crash (denial of service) or execute arbitrary code."], "name": "CVE-2026-72125", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "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-2026-72125\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72125\nhttps://lore.kernel.org/linux-cve-announce/2026081529-CVE-2026-72125-d585@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e057dd3fc20ffb3d7f150af46542a51b59b90127,0b811c4bbe3ec9ad611e90a540fe8b51b3bb8a96)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e057dd3fc20ffb3d7f150af46542a51b59b90127,43884dc7963beef2328f507f4fe680bdc173eb80)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e057dd3fc20ffb3d7f150af46542a51b59b90127,7bef39ba76eb7307ed22a50329e0f5776dbeda58)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e057dd3fc20ffb3d7f150af46542a51b59b90127,e442b62ba5a7756c17e05a77b32cdd085a2b6138)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[e057dd3fc20ffb3d7f150af46542a51b59b90127,20bab8b88baac140ca3701116e1d486c7f51e311)"}}], "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": "generic", "value": "5.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.10)"}}, {"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": "[6.18.40,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0]"}}, {"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": "2026-08-15T13:15:02.963041+00:00", "updated": "2026-08-18T03:00:09.691263+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}