CVE-2026-31676
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.39% probability · 32th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414ePatch
- https://git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd
- https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91cPatch
- https://git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd
- https://git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a
- https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585Patch
- https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041cPatch
- https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.