CVE-2026-31677 (GCVE-0-2026-31677)

Vulnerability from cvelistv5 – Published: 2026-04-25 08:46 – Updated: 2026-05-11 22:13
VLAI
Title
crypto: af_alg - limit RX SG extraction by receive buffer budget
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - limit RX SG extraction by receive buffer budget Make af_alg_get_rsgl() limit each RX scatterlist extraction to the remaining receive buffer budget. af_alg_get_rsgl() currently uses af_alg_readable() only as a gate before extracting data into the RX scatterlist. Limit each extraction to the remaining af_alg_rcvbuf(sk) budget so that receive-side accounting matches the amount of data attached to the request. If skcipher cannot obtain enough RX space for at least one chunk while more data remains to be processed, reject the recvmsg call instead of rounding the request length down to zero.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e870456d8e7c8d57c059ea479b5aadbb55ff4c3a , < 9bf3e6ccfdcfe56ae3190d1ae987dacf1cfef4f9 (git)
Affected: e870456d8e7c8d57c059ea479b5aadbb55ff4c3a , < 07c6f6ffe29009426f0bd4d3cfbb6308b8ea8453 (git)
Affected: e870456d8e7c8d57c059ea479b5aadbb55ff4c3a , < 4a264b2614c73c96666e196bbabe0cead52bdba7 (git)
Affected: e870456d8e7c8d57c059ea479b5aadbb55ff4c3a , < 8eceab19eba9dcbfd2a0daec72e1bf48aa100170 (git)
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Linux Linux Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 6.12.83 , ≤ 6.12.* (semver)
Unaffected: 6.18.24 , ≤ 6.18.* (semver)
Unaffected: 6.19.14 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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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

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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.