{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-93261",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-17T16:02:15.097Z",
        "datePublished": "2026-09-24T15:51:59.638Z",
        "dateUpdated": "2026-10-19T09:08:14.521Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:08:14.521Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlocking/lockdep: Fix NULL pointer dereference in __lock_set_class()\n\nregister_lock_class() can return NULL when the lock class pool is\nexhausted, graph_lock() fails, or key validation fails. However,\n__lock_set_class() uses the return value directly in pointer arithmetic\nwithout a NULL check:\n\n  class = register_lock_class(lock, subclass, 0);\n  hlock->class_idx = class - lock_classes;\n\nIf class is NULL, this computes a wild offset that corrupts\nhlock->class_idx. The subsequent reacquire_held_locks() call will\ninvoke hlock_class() with this corrupted index, leading to a NULL or\nout-of-bounds pointer dereference.\n\nAdd the missing NULL check, consistent with how __lock_acquire() already\nhandles this case at the same call site."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/locking/lockdep.c"
                    ],
                    "versions": [
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                            "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
                            "lessThan": "f6093ff67ea6e347574819ed23e96e0f82a25ffc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
                            "lessThan": "59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
                            "lessThan": "f56e54fd24f05e9de528fcb77f6084f80c8066ce",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
                            "lessThan": "5c3bff6cf26e6a54fbf8b893a879c32824d2d50d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
                            "lessThan": "b2113dcd8238bf00ce37a34e67b29cf31d32a545",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
                            "lessThan": "e7c69c6695d84220847cca62a45e879e71e79e9d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
                            "lessThan": "9be10f49dfc2e4b472b3a5f346483b67374774b8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "64aa348edc617dea17bbd01ddee4e47886d5ec8c",
                            "lessThan": "7577e00b9ab506202b9f1a33de3cc8cc6413a4db",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/locking/lockdep.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.27",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.27",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.270",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "5.10.270"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionEndExcluding": "7.3"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/f6093ff67ea6e347574819ed23e96e0f82a25ffc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f56e54fd24f05e9de528fcb77f6084f80c8066ce"
                },
                {
                    "url": "https://git.kernel.org/stable/c/5c3bff6cf26e6a54fbf8b893a879c32824d2d50d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b2113dcd8238bf00ce37a34e67b29cf31d32a545"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e7c69c6695d84220847cca62a45e879e71e79e9d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9be10f49dfc2e4b472b3a5f346483b67374774b8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7577e00b9ab506202b9f1a33de3cc8cc6413a4db"
                }
            ],
            "title": "locking/lockdep: Fix NULL pointer dereference in __lock_set_class()",
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}