rxrpc: only handle RESPONSE during service challenge

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Summary

CVECVE-2026-31676
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-25 09:16:01 UTC
Updated2026-06-01 17:16:55 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.000170000 probability, percentile 0.040590000 (date 2026-04-27)

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 17926a79320afa9b95df6b977b40cca6d8713cea a1a8efde03a40b6c658d580e96644d9b9a2a0d3a git Not specified
CNA Linux Linux affected 17926a79320afa9b95df6b977b40cca6d8713cea 6c3a0fbdafef8316e34ae22333e317a341e737cd git Not specified
CNA Linux Linux affected 17926a79320afa9b95df6b977b40cca6d8713cea 0afdfd4941c1b60a1f5c361760daa970edca60cd git Not specified
CNA Linux Linux affected 17926a79320afa9b95df6b977b40cca6d8713cea a6bcf8010af093fe04f7100562e9542ab7882585 git Not specified
CNA Linux Linux affected 17926a79320afa9b95df6b977b40cca6d8713cea 29b44d904dceb832be880def08b8cb17a0aba91c git Not specified
CNA Linux Linux affected 17926a79320afa9b95df6b977b40cca6d8713cea d0035e634dae83237ab7f5681eb52b2f65d0ceb8 git Not specified
CNA Linux Linux affected 17926a79320afa9b95df6b977b40cca6d8713cea 03fd2ef73cb4ffd0af100a95b634af54f474414e git Not specified
CNA Linux Linux affected 17926a79320afa9b95df6b977b40cca6d8713cea c43ffdcfdbb5567b1f143556df8a04b4eeea041c git Not specified
CNA Linux Linux affected 2.6.22 Not specified
CNA Linux Linux unaffected 2.6.22 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.136 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.84 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.23 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.13 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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