github - ghsa-rfcq-q5wv-mpcg

GHSA-RFCQ-Q5WV-MPCG

Vulnerability from github – Published: 2025-10-04 09:30 – Updated: 2025-10-04 09:30

Details

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.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2025-39931"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-10-04T08:15:45Z",
    "severity": null
  },
  "details": "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": "GHSA-rfcq-q5wv-mpcg",
  "modified": "2025-10-04T09:30:20Z",
  "published": "2025-10-04T09:30:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-39931"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/045ee26aa3920a47ec46d7fcb302420bf01fd753"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2374c11189ef704a3e4863646369f1b8e6a27d71"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24c1106504c625fabd3b7229611af617b4c27ac7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6241b9e2809b12da9130894cf5beddf088dc1b8a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9574b2330dbd2b5459b74d3b5e9619d39299fc6f"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-39931 (GCVE-0-2025-39931)

Vulnerability from cvelistv5 – Published: 2025-10-04 07:30 – Updated: 2025-10-04 07:30

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.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/6241b9e2809b12da9…
	https://git.kernel.org/stable/c/2374c11189ef704a3…
	https://git.kernel.org/stable/c/24c1106504c625fab…
	https://git.kernel.org/stable/c/045ee26aa3920a47e…
	https://git.kernel.org/stable/c/9574b2330dbd2b545…

Impacted products

Vendor

Product

Version

Linux

Affected: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2 , < 6241b9e2809b12da9130894cf5beddf088dc1b8a (git)
Affected: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2 , < 2374c11189ef704a3e4863646369f1b8e6a27d71 (git)
Affected: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2 , < 24c1106504c625fabd3b7229611af617b4c27ac7 (git)
Affected: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2 , < 045ee26aa3920a47ec46d7fcb302420bf01fd753 (git)
Affected: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2 , < 9574b2330dbd2b5459b74d3b5e9619d39299fc6f (git)

Linux

Affected: 2.6.38
Unaffected: 0 , < 2.6.38 (semver)
Unaffected: 6.1.154 , ≤ 6.1.* (semver)
Unaffected: 6.6.108 , ≤ 6.6.* (semver)
Unaffected: 6.12.49 , ≤ 6.12.* (semver)
Unaffected: 6.16.9 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "crypto/af_alg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6241b9e2809b12da9130894cf5beddf088dc1b8a",
              "status": "affected",
              "version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
              "versionType": "git"
            },
            {
              "lessThan": "2374c11189ef704a3e4863646369f1b8e6a27d71",
              "status": "affected",
              "version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
              "versionType": "git"
            },
            {
              "lessThan": "24c1106504c625fabd3b7229611af617b4c27ac7",
              "status": "affected",
              "version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
              "versionType": "git"
            },
            {
              "lessThan": "045ee26aa3920a47ec46d7fcb302420bf01fd753",
              "status": "affected",
              "version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
              "versionType": "git"
            },
            {
              "lessThan": "9574b2330dbd2b5459b74d3b5e9619d39299fc6f",
              "status": "affected",
              "version": "8ff590903d5fc7f5a0a988c38267a3d08e6393a2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "crypto/af_alg.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.38"
            },
            {
              "lessThan": "2.6.38",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.108",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.49",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.154",
                  "versionStartIncluding": "2.6.38",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.108",
                  "versionStartIncluding": "2.6.38",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.49",
                  "versionStartIncluding": "2.6.38",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.9",
                  "versionStartIncluding": "2.6.38",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17",
                  "versionStartIncluding": "2.6.38",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-04T07:30:55.964Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6241b9e2809b12da9130894cf5beddf088dc1b8a"
        },
        {
          "url": "https://git.kernel.org/stable/c/2374c11189ef704a3e4863646369f1b8e6a27d71"
        },
        {
          "url": "https://git.kernel.org/stable/c/24c1106504c625fabd3b7229611af617b4c27ac7"
        },
        {
          "url": "https://git.kernel.org/stable/c/045ee26aa3920a47ec46d7fcb302420bf01fd753"
        },
        {
          "url": "https://git.kernel.org/stable/c/9574b2330dbd2b5459b74d3b5e9619d39299fc6f"
        }
      ],
      "title": "crypto: af_alg - Set merge to zero early in af_alg_sendmsg",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39931",
    "datePublished": "2025-10-04T07:30:55.964Z",
    "dateReserved": "2025-04-16T07:20:57.147Z",
    "dateUpdated": "2025-10-04T07:30:55.964Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-RFCQ-Q5WV-MPCG

CVE-2025-39931 (GCVE-0-2025-39931)

Tags

Sightings

Nomenclature