{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-93261",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-93261"
  ],
  "published": "2026-09-24T15:54:02Z",
  "summary": "locking/lockdep: Fix NULL pointer dereference in __lock_set_class()",
  "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->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": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-93261"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f6093ff67ea6e347574819ed23e96e0f82a25ffc"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f56e54fd24f05e9de528fcb77f6084f80c8066ce"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5c3bff6cf26e6a54fbf8b893a879c32824d2d50d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b2113dcd8238bf00ce37a34e67b29cf31d32a545"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e7c69c6695d84220847cca62a45e879e71e79e9d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9be10f49dfc2e4b472b3a5f346483b67374774b8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7577e00b9ab506202b9f1a33de3cc8cc6413a4db"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-24T15:54:02Z"
  }
}