CVE-2025-39931 (GCVE-0-2025-39931)
Vulnerability from cvelistv5
Published
2025-10-04 07:30
Modified
2025-10-04 07:30
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
Impacted products
Vendor Product Version
Linux Linux Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
Version: 8ff590903d5fc7f5a0a988c38267a3d08e6393a2
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{
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          "programFiles": [
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      "descriptions": [
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          "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."
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        "dateUpdated": "2025-10-04T07:30:55.964Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "crypto: af_alg - Set merge to zero early in af_alg_sendmsg",
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    "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"
  },
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