GHSA-P7WH-PHC3-G7XR

Vulnerability from github – Published: 2025-12-04 18:30 – Updated: 2025-12-04 18:30
VLAI?
Details

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

sctp: avoid NULL dereference when chunk data buffer is missing

chunk->skb pointer is dereferenced in the if-block where it's supposed to be NULL only.

chunk->skb can only be NULL if chunk->head_skb is not. Check for frag_list instead and do it just before replacing chunk->skb. We're sure that otherwise chunk->skb is non-NULL because of outer if() condition.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40240"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-12-04T16:16:17Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: avoid NULL dereference when chunk data buffer is missing\n\nchunk-\u003eskb pointer is dereferenced in the if-block where it\u0027s supposed\nto be NULL only.\n\nchunk-\u003eskb can only be NULL if chunk-\u003ehead_skb is not. Check for frag_list\ninstead and do it just before replacing chunk-\u003eskb. We\u0027re sure that\notherwise chunk-\u003eskb is non-NULL because of outer if() condition.",
  "id": "GHSA-p7wh-phc3-g7xr",
  "modified": "2025-12-04T18:30:52Z",
  "published": "2025-12-04T18:30:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40240"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/03e80a4b04ef1fb2c61dd63216ab8d3a5dcb196f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/08165c296597075763130919f2aae59b5822f016"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/441f0647f7673e0e64d4910ef61a5fb8f16bfb82"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f6da435fb5d8a21cbf8cae5ca5a2ba0e1012b71"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/61cda2777b07d27459f5cac5a047c3edf9c8a1a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a832b0f99be19df608cb75c023f8027b1789bd1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/89b465b54227c245ddc7cc9ed822231af21123ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb9055ba30306ede4ad920002233d0659982f1cb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}


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