{"id":"CVE-2026-93261","revision":"f94028b908784705ac40ac2ae1474960","records":[{"revision":"f94028b908784705ac40ac2ae1474960","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-93261","aliases":[],"title":"locking/lockdep: Fix NULL pointer dereference in __lock_set_class()","description":"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.","state":0,"publishedAt":"2026-09-24T15:51:59.638+00:00","modifiedAt":"2026-10-19T09:08:14.521+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/locking/lockdep.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"64aa348edc617dea17bbd01ddee4e47886d5ec8c\",\n                            \"lessThan\": \"f6093ff67ea6e347574819ed23e96e0f82a25ffc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"64aa348edc617dea17bbd01ddee4e47886d5ec8c\",\n                            \"lessThan\": \"59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"64aa348edc617dea17bbd01ddee4e47886d5ec8c\",\n                            \"lessThan\": \"f56e54fd24f05e9de528fcb77f6084f80c8066ce\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"64aa348edc617dea17bbd01ddee4e47886d5ec8c\",\n                            \"lessThan\": \"5c3bff6cf26e6a54fbf8b893a879c32824d2d50d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"64aa348edc617dea17bbd01ddee4e47886d5ec8c\",\n                            \"lessThan\": \"b2113dcd8238bf00ce37a34e67b29cf31d32a545\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"64aa348edc617dea17bbd01ddee4e47886d5ec8c\",\n                            \"lessThan\": \"e7c69c6695d84220847cca62a45e879e71e79e9d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"64aa348edc617dea17bbd01ddee4e47886d5ec8c\",\n                            \"lessThan\": \"9be10f49dfc2e4b472b3a5f346483b67374774b8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"64aa348edc617dea17bbd01ddee4e47886d5ec8c\",\n                            \"lessThan\": \"7577e00b9ab506202b9f1a33de3cc8cc6413a4db\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"kernel/locking/lockdep.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.27\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.27\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.52\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.6\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/f6093ff67ea6e347574819ed23e96e0f82a25ffc","https://git.kernel.org/stable/c/59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2","https://git.kernel.org/stable/c/f56e54fd24f05e9de528fcb77f6084f80c8066ce","https://git.kernel.org/stable/c/5c3bff6cf26e6a54fbf8b893a879c32824d2d50d","https://git.kernel.org/stable/c/b2113dcd8238bf00ce37a34e67b29cf31d32a545","https://git.kernel.org/stable/c/e7c69c6695d84220847cca62a45e879e71e79e9d","https://git.kernel.org/stable/c/9be10f49dfc2e4b472b3a5f346483b67374774b8","https://git.kernel.org/stable/c/7577e00b9ab506202b9f1a33de3cc8cc6413a4db"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93261","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93261","identifiers":["CVE-2026-93261"]},"retained":false,"historicalAffected":[]}],"coverage":[]}