CVE-2025-40022 (GCVE-0-2025-40022)

Vulnerability from cvelistv5 – Published: 2025-10-24 12:24 – Updated: 2026-05-12 12:07
VLAI
Title
crypto: af_alg - Fix incorrect boolean values in af_alg_ctx
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx Commit 1b34cbbf4f01 ("crypto: af_alg - Disallow concurrent writes in af_alg_sendmsg") changed some fields from bool to 1-bit bitfields of type u32. However, some assignments to these fields, specifically 'more' and 'merge', assign values greater than 1. These relied on C's implicit conversion to bool, such that zero becomes false and nonzero becomes true. With a 1-bit bitfields of type u32 instead, mod 2 of the value is taken instead, resulting in 0 being assigned in some cases when 1 was intended. Fix this by restoring the bool type.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 0f28c4adbc4a97437874c9b669fd7958a8c6d6ce , < 3a21698ace915a445bce2d0dcfc84b6d2199baf7 (git)
Affected: e4c1ec11132ec466f7362a95f36a506ce4dc08c9 , < d382d6daf0184490f366562469a5673f65ee2662 (git)
Affected: 1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8 , < 54506c6335690f4ef1b9f154e34f5a604c72c1ed (git)
Affected: 7c4491b5644e3a3708f3dbd7591be0a570135b84 , < 8703940bd30b5ad94408d28d7192db2491cd3592 (git)
Affected: 9aee87da5572b3a14075f501752e209801160d3d , < 316b090c2fee964c307a634fecc7df269664b158 (git)
Affected: 45bcf60fe49b37daab1acee57b27211ad1574042 , < fbe96bd25423e61273d8831e995260b429d850b6 (git)
Affected: 1b34cbbf4f011a121ef7b2d7d6e6920a036d5285 , < d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb (git)
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Linux Linux Affected: 6.1.154 , < 6.1.155 (semver)
Affected: 6.6.108 , < 6.6.109 (semver)
Affected: 6.12.49 , < 6.12.50 (semver)
Affected: 6.16.9 , < 6.16.10 (semver)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Show details on NVD website
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.