GHSA-953J-P37P-R755

Vulnerability from github – Published: 2026-01-23 18:31 – Updated: 2026-01-23 18:31
VLAI?
Details

In the Linux kernel, the following vulnerability has been resolved:

libceph: make free_choose_arg_map() resilient to partial allocation

free_choose_arg_map() may dereference a NULL pointer if its caller fails after a partial allocation.

For example, in decode_choose_args(), if allocation of arg_map->args fails, execution jumps to the fail label and free_choose_arg_map() is called. Since arg_map->size is updated to a non-zero value before memory allocation, free_choose_arg_map() will iterate over arg_map->args and dereference a NULL pointer.

To prevent this potential NULL pointer dereference and make free_choose_arg_map() more resilient, add checks for pointers before iterating.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-22991"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-23T16:15:55Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: make free_choose_arg_map() resilient to partial allocation\n\nfree_choose_arg_map() may dereference a NULL pointer if its caller fails\nafter a partial allocation.\n\nFor example, in decode_choose_args(), if allocation of arg_map-\u003eargs\nfails, execution jumps to the fail label and free_choose_arg_map() is\ncalled. Since arg_map-\u003esize is updated to a non-zero value before memory\nallocation, free_choose_arg_map() will iterate over arg_map-\u003eargs and\ndereference a NULL pointer.\n\nTo prevent this potential NULL pointer dereference and make\nfree_choose_arg_map() more resilient, add checks for pointers before\niterating.",
  "id": "GHSA-953j-p37p-r755",
  "modified": "2026-01-23T18:31:29Z",
  "published": "2026-01-23T18:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-22991"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8081faaf089db5280c3be820948469f7c58ef8dd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/851241d3f78a5505224dc21c03d8692f530256b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9b3730dabcf3764bfe3ff07caf55e641a0b45234"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3fe30e57649c551757a02e1cad073c47e1e075e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ec1850f663da64842614c86b20fe734be070c2ba"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f21c3fdb96833aac2f533506899fe38c19cf49d5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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