{
    "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"
                                },
                                {
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                                    "versionStartIncluding": "4.9",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "4.9",
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                                },
                                {
                                    "vulnerable": true,
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                                    "versionStartIncluding": "4.9",
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                                },
                                {
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                                    "versionEndExcluding": "7.1.6"
                                },
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                                    "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()",
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}