CVE-2026-31676 (GCVE-0-2026-31676)

Vulnerability from cvelistv5 – Published: 2026-04-25 08:46 – Updated: 2026-04-27 14:04
VLAI?
Title
rxrpc: only handle RESPONSE during service challenge
Summary
In the Linux kernel, the following vulnerability has been resolved: rxrpc: only handle RESPONSE during service challenge Only process RESPONSE packets while the service connection is still in RXRPC_CONN_SERVICE_CHALLENGING. Check that state under state_lock before running response verification and security initialization, then use a local secured flag to decide whether to queue the secured-connection work after the state transition. This keeps duplicate or late RESPONSE packets from re-running the setup path and removes the unlocked post-transition state test.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 17926a79320afa9b95df6b977b40cca6d8713cea , < a6bcf8010af093fe04f7100562e9542ab7882585 (git)
Affected: 17926a79320afa9b95df6b977b40cca6d8713cea , < 29b44d904dceb832be880def08b8cb17a0aba91c (git)
Affected: 17926a79320afa9b95df6b977b40cca6d8713cea , < d0035e634dae83237ab7f5681eb52b2f65d0ceb8 (git)
Affected: 17926a79320afa9b95df6b977b40cca6d8713cea , < 03fd2ef73cb4ffd0af100a95b634af54f474414e (git)
Affected: 17926a79320afa9b95df6b977b40cca6d8713cea , < c43ffdcfdbb5567b1f143556df8a04b4eeea041c (git)
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    Linux Linux Affected: 2.6.22
Unaffected: 0 , < 2.6.22 (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.84 , ≤ 6.12.* (semver)
Unaffected: 6.18.23 , ≤ 6.18.* (semver)
Unaffected: 6.19.13 , ≤ 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.



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