CVE-2026-68357

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68357", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.385Z", "datePublished": "2026-08-10T12:03:34.241Z", "dateUpdated": "2026-08-19T16:34:05.347Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:34:05.347Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwatchdog: pretimeout: Fix UAF in watchdog_unregister_governor()\n\nWhen a watchdog governor is unregistered, it updates existing watchdog\ndevices that were using this governor by falling back to `default_gov`.\n\nIf the governor being unregistered is currently set as `default_gov`,\nthe `default_gov` is never cleared. This leads to 2 use-after-free\nissues:\n1. New watchdog devices registered after this point will inherit the\n dangling `default_gov`.\n2. Existing watchdog devices using the unregistered governor will have\n their `wdd->gov` reassigned to the dangling `default_gov`.\n\nFix the UAF by clearing `default_gov` if it matches the governor being\nunregistered."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/watchdog/watchdog_pretimeout.c"], "versions": [{"version": "da0d12ff2b829a35e9921918e925d79497b82bef", "lessThan": "b9ae33faa96bdec6bc60e4c5f8f53786182e4207", "status": "affected", "versionType": "git"}, {"version": "da0d12ff2b829a35e9921918e925d79497b82bef", "lessThan": "472ec1e34ff0bb26379805cae808f658cce58c35", "status": "affected", "versionType": "git"}, {"version": "da0d12ff2b829a35e9921918e925d79497b82bef", "lessThan": "7a2ee3ec6f208307eca1119a343c7b5d39c03708", "status": "affected", "versionType": "git"}, {"version": "da0d12ff2b829a35e9921918e925d79497b82bef", "lessThan": "2e47b91b9b4020fcc01def14d6b6556d66074cf4", "status": "affected", "versionType": "git"}, {"version": "da0d12ff2b829a35e9921918e925d79497b82bef", "lessThan": "0ca252720f0e38411cfec3431db9bb1aed0a412c", "status": "affected", "versionType": "git"}, {"version": "da0d12ff2b829a35e9921918e925d79497b82bef", "lessThan": "7d1658b066de30f4b23afc14814d22416a971e6e", "status": "affected", "versionType": "git"}, {"version": "da0d12ff2b829a35e9921918e925d79497b82bef", "lessThan": "7993d626983cc58fbde9607333cfd2d57725c197", "status": "affected", "versionType": "git"}, {"version": "da0d12ff2b829a35e9921918e925d79497b82bef", "lessThan": "7362ba0f9c96ac3ad6a2ca3995bd9fc9a28a8661", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/watchdog/watchdog_pretimeout.c"], "versions": [{"version": "4.9", "status": "affected"}, {"version": "0", "lessThan": "4.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "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": "6.18.42", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.6", "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": "4.9", "versionEndExcluding": "5.10.265"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "5.15.216"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.6.148"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.12.101"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.18.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "7.1.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/b9ae33faa96bdec6bc60e4c5f8f53786182e4207"}, {"url": "https://git.kernel.org/stable/c/472ec1e34ff0bb26379805cae808f658cce58c35"}, {"url": "https://git.kernel.org/stable/c/7a2ee3ec6f208307eca1119a343c7b5d39c03708"}, {"url": "https://git.kernel.org/stable/c/2e47b91b9b4020fcc01def14d6b6556d66074cf4"}, {"url": "https://git.kernel.org/stable/c/0ca252720f0e38411cfec3431db9bb1aed0a412c"}, {"url": "https://git.kernel.org/stable/c/7d1658b066de30f4b23afc14814d22416a971e6e"}, {"url": "https://git.kernel.org/stable/c/7993d626983cc58fbde9607333cfd2d57725c197"}, {"url": "https://git.kernel.org/stable/c/7362ba0f9c96ac3ad6a2ca3995bd9fc9a28a8661"}], "title": "watchdog: pretimeout: Fix UAF in watchdog_unregister_governor()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/watchdog/watchdog_pretimeout.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b9ae33faa96bdec6bc60e4c5f8f53786182e4207", "status": "affected", "version": "da0d12ff2b829a35e9921918e925d79497b82bef", "versionType": "git"}, {"lessThan": "472ec1e34ff0bb26379805cae808f658cce58c35", "status": "affected", "version": "da0d12ff2b829a35e9921918e925d79497b82bef", "versionType": "git"}, {"lessThan": "7a2ee3ec6f208307eca1119a343c7b5d39c03708", "status": "affected", "version": "da0d12ff2b829a35e9921918e925d79497b82bef", "versionType": "git"}, {"lessThan": "2e47b91b9b4020fcc01def14d6b6556d66074cf4", "status": "affected", "version": "da0d12ff2b829a35e9921918e925d79497b82bef", "versionType": "git"}, {"lessThan": "0ca252720f0e38411cfec3431db9bb1aed0a412c", "status": "affected", "version": "da0d12ff2b829a35e9921918e925d79497b82bef", "versionType": "git"}, {"lessThan": "7d1658b066de30f4b23afc14814d22416a971e6e", "status": "affected", "version": "da0d12ff2b829a35e9921918e925d79497b82bef", "versionType": "git"}, {"lessThan": "7993d626983cc58fbde9607333cfd2d57725c197", "status": "affected", "version": "da0d12ff2b829a35e9921918e925d79497b82bef", "versionType": "git"}, {"lessThan": "7362ba0f9c96ac3ad6a2ca3995bd9fc9a28a8661", "status": "affected", "version": "da0d12ff2b829a35e9921918e925d79497b82bef", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/watchdog/watchdog_pretimeout.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.9"}, {"lessThan": "4.9", "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": "7.1.6", "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\nwatchdog: pretimeout: Fix UAF in watchdog_unregister_governor()\n\nWhen a watchdog governor is unregistered, it updates existing watchdog\ndevices that were using this governor by falling back to `default_gov`.\n\nIf the governor being unregistered is currently set as `default_gov`,\nthe `default_gov` is never cleared. This leads to 2 use-after-free\nissues:\n1. New watchdog devices registered after this point will inherit the\n dangling `default_gov`.\n2. Existing watchdog devices using the unregistered governor will have\n their `wdd->gov` reassigned to the dangling `default_gov`.\n\nFix the UAF by clearing `default_gov` if it matches the governor being\nunregistered."}], "id": "CVE-2026-68357", "lastModified": "2026-08-19T17:20:45.310", "metrics": {}, "published": "2026-08-10T13:20:28.160", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0ca252720f0e38411cfec3431db9bb1aed0a412c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2e47b91b9b4020fcc01def14d6b6556d66074cf4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/472ec1e34ff0bb26379805cae808f658cce58c35"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7362ba0f9c96ac3ad6a2ca3995bd9fc9a28a8661"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7993d626983cc58fbde9607333cfd2d57725c197"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7a2ee3ec6f208307eca1119a343c7b5d39c03708"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7d1658b066de30f4b23afc14814d22416a971e6e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b9ae33faa96bdec6bc60e4c5f8f53786182e4207"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: watchdog: pretimeout: Fix UAF in watchdog_unregister_governor()", "id": "2513144", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513144"}, "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-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwatchdog: pretimeout: Fix UAF in watchdog_unregister_governor()\nWhen a watchdog governor is unregistered, it updates existing watchdog\ndevices that were using this governor by falling back to `default_gov`.\nIf the governor being unregistered is currently set as `default_gov`,\nthe `default_gov` is never cleared. This leads to 2 use-after-free\nissues:\n1. New watchdog devices registered after this point will inherit the\ndangling `default_gov`.\n2. Existing watchdog devices using the unregistered governor will have\ntheir `wdd->gov` reassigned to the dangling `default_gov`.\nFix the UAF by clearing `default_gov` if it matches the governor being\nunregistered.", "A flaw was found in the Linux kernel's watchdog subsystem. When a watchdog governor is unregistered, if it is also set as the default governor, the default governor is not properly cleared. This can lead to a Use-After-Free (UAF) condition where new or existing watchdog devices may inherit or be reassigned a dangling pointer. This vulnerability could result in system instability or a denial of service."], "name": "CVE-2026-68357", "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": "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": "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": "2026-08-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-68357\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-68357\nhttps://lore.kernel.org/linux-cve-announce/2026081040-CVE-2026-68357-c18c@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[da0d12ff2b829a35e9921918e925d79497b82bef,2e47b91b9b4020fcc01def14d6b6556d66074cf4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[da0d12ff2b829a35e9921918e925d79497b82bef,0ca252720f0e38411cfec3431db9bb1aed0a412c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[da0d12ff2b829a35e9921918e925d79497b82bef,7362ba0f9c96ac3ad6a2ca3995bd9fc9a28a8661)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[da0d12ff2b829a35e9921918e925d79497b82bef,7993d626983cc58fbde9607333cfd2d57725c197)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[da0d12ff2b829a35e9921918e925d79497b82bef,7d1658b066de30f4b23afc14814d22416a971e6e)"}}], "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": "4.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.148,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.101,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.42,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.6,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc5,*]"}}], "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": "2026-08-10T16:45:03.476692+00:00", "updated": "2026-08-13T04:00:09.645104+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}