{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "64aa348edc617dea17bbd01ddee4e47886d5ec8c"
            },
            {
              "fixed": "f6093ff67ea6e347574819ed23e96e0f82a25ffc"
            },
            {
              "fixed": "59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2"
            },
            {
              "fixed": "f56e54fd24f05e9de528fcb77f6084f80c8066ce"
            },
            {
              "fixed": "5c3bff6cf26e6a54fbf8b893a879c32824d2d50d"
            },
            {
              "fixed": "b2113dcd8238bf00ce37a34e67b29cf31d32a545"
            },
            {
              "fixed": "e7c69c6695d84220847cca62a45e879e71e79e9d"
            },
            {
              "fixed": "9be10f49dfc2e4b472b3a5f346483b67374774b8"
            },
            {
              "fixed": "7577e00b9ab506202b9f1a33de3cc8cc6413a4db"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.27"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93261.json"
  },
  "details": "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-\u003eclass_idx = class - lock_classes;\n\nIf class is NULL, this computes a wild offset that corrupts\nhlock-\u003eclass_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.",
  "id": "CVE-2026-93261",
  "modified": "2026-09-26T03:30:35.227830231Z",
  "published": "2026-09-24T15:51:59.638Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5c3bff6cf26e6a54fbf8b893a879c32824d2d50d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7577e00b9ab506202b9f1a33de3cc8cc6413a4db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9be10f49dfc2e4b472b3a5f346483b67374774b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2113dcd8238bf00ce37a34e67b29cf31d32a545"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e7c69c6695d84220847cca62a45e879e71e79e9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f56e54fd24f05e9de528fcb77f6084f80c8066ce"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6093ff67ea6e347574819ed23e96e0f82a25ffc"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93261.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93261"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "locking/lockdep: Fix NULL pointer dereference in __lock_set_class()"
}