github - ghsa-fxwg-47f2-r9jw

GHSA-FXWG-47F2-R9JW

Vulnerability from github – Published: 2025-11-13 00:30 – Updated: 2025-11-13 00:30

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-40182"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-11-12T22:15:44Z",
    "severity": null
  },
  "details": "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": "GHSA-fxwg-47f2-r9jw",
  "modified": "2025-11-13T00:30:17Z",
  "published": "2025-11-13T00:30:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-40182"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/229c586b5e86979badb7cb0d38717b88a9e95ddd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f041339d6b9a5a46437f0c48fc7279c92af7a513"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-40182 (GCVE-0-2025-40182)

Vulnerability from cvelistv5 – Published: 2025-11-12 21:56 – Updated: 2025-12-01 06:19

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

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/f041339d6b9a5a464…
	https://git.kernel.org/stable/c/229c586b5e86979ba…

Impacted products

Vendor

Product

Version

Linux

Affected: afddce13ce81d52a13898fa0700917835c71acd6 , < f041339d6b9a5a46437f0c48fc7279c92af7a513 (git)
Affected: afddce13ce81d52a13898fa0700917835c71acd6 , < 229c586b5e86979badb7cb0d38717b88a9e95ddd (git)

Linux

Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.17.4 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "crypto/skcipher.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f041339d6b9a5a46437f0c48fc7279c92af7a513",
              "status": "affected",
              "version": "afddce13ce81d52a13898fa0700917835c71acd6",
              "versionType": "git"
            },
            {
              "lessThan": "229c586b5e86979badb7cb0d38717b88a9e95ddd",
              "status": "affected",
              "version": "afddce13ce81d52a13898fa0700917835c71acd6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "crypto/skcipher.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "lessThan": "6.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.17.*",
              "status": "unaffected",
              "version": "6.17.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17.4",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18",
                  "versionStartIncluding": "6.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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"
        }
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      "providerMetadata": {
        "dateUpdated": "2025-12-01T06:19:39.499Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f041339d6b9a5a46437f0c48fc7279c92af7a513"
        },
        {
          "url": "https://git.kernel.org/stable/c/229c586b5e86979badb7cb0d38717b88a9e95ddd"
        }
      ],
      "title": "crypto: skcipher - Fix reqsize handling",
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    }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40182",
    "datePublished": "2025-11-12T21:56:26.699Z",
    "dateReserved": "2025-04-16T07:20:57.177Z",
    "dateUpdated": "2025-12-01T06:19:39.499Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-FXWG-47F2-R9JW

CVE-2025-40182 (GCVE-0-2025-40182)

Tags

Sightings

Nomenclature