CVE-2026-31676
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in. High risk of service disruption.
- Exploit odds
- 0.5% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.5% in the next 30 days (EPSS).
- Severity: 7.5 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.5% · EPSS, next 30 days
- Weakness
- CWE-362 · Race condition
- Record status
- Modified
Affected
- Linux Kernel < 6.6.136
- Linux Kernel < 6.12.84
- Linux Kernel < 6.18.23
- Linux Kernel < 6.19.13
- Linux Kernel 7.0
Attack profile CVSS 3.1 · 7.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2026-31676.md and follow it. Check whether this project is affected by CVE-2026-31676. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e
- https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c
- https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585
- https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c
- https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8
References
- https://git.kernel.org/stable/c/03fd2ef73cb4ffd0af100a95b634af54f474414e
- https://git.kernel.org/stable/c/0afdfd4941c1b60a1f5c361760daa970edca60cd
- https://git.kernel.org/stable/c/29b44d904dceb832be880def08b8cb17a0aba91c
- https://git.kernel.org/stable/c/6c3a0fbdafef8316e34ae22333e317a341e737cd
- https://git.kernel.org/stable/c/a1a8efde03a40b6c658d580e96644d9b9a2a0d3a
- https://git.kernel.org/stable/c/a6bcf8010af093fe04f7100562e9542ab7882585
- https://git.kernel.org/stable/c/c43ffdcfdbb5567b1f143556df8a04b4eeea041c
- https://git.kernel.org/stable/c/d0035e634dae83237ab7f5681eb52b2f65d0ceb8
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html