fkie_cve-2025-39931
Vulnerability from fkie_nvd
Published
2025-10-04 08:15
Modified
2025-10-06 14:56
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Set merge to zero early in af_alg_sendmsg If an error causes af_alg_sendmsg to abort, ctx->merge may contain a garbage value from the previous loop. This may then trigger a crash on the next entry into af_alg_sendmsg when it attempts to do a merge that can't be done. Fix this by setting ctx->merge to zero near the start of the loop.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/045ee26aa3920a47ec46d7fcb302420bf01fd753
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2374c11189ef704a3e4863646369f1b8e6a27d71
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/24c1106504c625fabd3b7229611af617b4c27ac7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6241b9e2809b12da9130894cf5beddf088dc1b8a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9574b2330dbd2b5459b74d3b5e9619d39299fc6f
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: af_alg - Set merge to zero early in af_alg_sendmsg\n\nIf an error causes af_alg_sendmsg to abort, ctx-\u003emerge may contain\na garbage value from the previous loop.  This may then trigger a\ncrash on the next entry into af_alg_sendmsg when it attempts to do\na merge that can\u0027t be done.\n\nFix this by setting ctx-\u003emerge to zero near the start of the loop."
    }
  ],
  "id": "CVE-2025-39931",
  "lastModified": "2025-10-06T14:56:47.823",
  "metrics": {},
  "published": "2025-10-04T08:15:45.827",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/045ee26aa3920a47ec46d7fcb302420bf01fd753"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2374c11189ef704a3e4863646369f1b8e6a27d71"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/24c1106504c625fabd3b7229611af617b4c27ac7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6241b9e2809b12da9130894cf5beddf088dc1b8a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9574b2330dbd2b5459b74d3b5e9619d39299fc6f"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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