fkie_cve-2025-40182
Vulnerability from fkie_nvd
Published
2025-11-12 22:15
Modified
2025-11-14 16:42
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: skcipher - Fix reqsize handling Commit afddce13ce81d ("crypto: api - Add reqsize to crypto_alg") introduced cra_reqsize field in crypto_alg struct to replace type specific reqsize fields. It looks like this was introduced specifically for ahash and acomp from the commit description as subsequent commits add necessary changes in these alg frameworks. However, this is being recommended for use in all crypto algs [1] instead of setting reqsize using crypto_*_set_reqsize(). Using cra_reqsize in skcipher algorithms, hence, causes memory corruptions and crashes as the underlying functions in the algorithm framework have not been updated to set the reqsize properly from cra_reqsize. [2] Add proper set_reqsize calls in the skcipher init function to properly initialize reqsize for these algorithms in the framework. [1]: https://lore.kernel.org/linux-crypto/aCL8BxpHr5OpT04k@gondor.apana.org.au/ [2]: https://gist.github.com/Pratham-T/24247446f1faf4b7843e4014d5089f6b
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/229c586b5e86979badb7cb0d38717b88a9e95ddd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f041339d6b9a5a46437f0c48fc7279c92af7a513
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: skcipher - Fix reqsize handling\n\nCommit afddce13ce81d (\"crypto: api - Add reqsize to crypto_alg\")\nintroduced cra_reqsize field in crypto_alg struct to replace type\nspecific reqsize fields. It looks like this was introduced specifically\nfor ahash and acomp from the commit description as subsequent commits\nadd necessary changes in these alg frameworks.\n\nHowever, this is being recommended for use in all crypto algs [1]\ninstead of setting reqsize using crypto_*_set_reqsize(). Using\ncra_reqsize in skcipher algorithms, hence, causes memory\ncorruptions and crashes as the underlying functions in the algorithm\nframework have not been updated to set the reqsize properly from\ncra_reqsize. [2]\n\nAdd proper set_reqsize calls in the skcipher init function to\nproperly initialize reqsize for these algorithms in the framework.\n\n[1]: https://lore.kernel.org/linux-crypto/aCL8BxpHr5OpT04k@gondor.apana.org.au/\n[2]: https://gist.github.com/Pratham-T/24247446f1faf4b7843e4014d5089f6b"
    }
  ],
  "id": "CVE-2025-40182",
  "lastModified": "2025-11-14T16:42:30.503",
  "metrics": {},
  "published": "2025-11-12T22:15:44.963",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/229c586b5e86979badb7cb0d38717b88a9e95ddd"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/f041339d6b9a5a46437f0c48fc7279c92af7a513"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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