CVE-2026-31642
What it is
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix call removal to use RCU safe deletion Fix rxrpc call removal from the rxnet->calls list to use list_del_rcu() rather than list_del_init() to prevent stuffing up reading /proc/net/rxrpc/calls from potentially getting into an infinite loop. This, however, means that list_empty() no longer works on an entry that's been deleted from the list, making it harder to detect prior deletion. Fix this by: Firstly, make rxrpc_destroy_all_calls() only dump the first ten calls that are unexpectedly still on the list. Limiting the number of steps means there's no need to call cond_resched() or to remove calls from the list here, thereby eliminating the need for rxrpc_put_call() to check for that. rxrpc_put_call() can then be fixed to unconditionally delete the call from the list as it is the only place that the deletion occurs.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of service disruption.
- Exploit odds
- 0.1% 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: 0.1% in the next 30 days (EPSS).
- Severity: 5.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.1% · EPSS, next 30 days
- Weakness
- CWE-835
- Record status
- Modified
Affected
- Linux Kernel < 6.6.135
- Linux Kernel < 6.12.82
- Linux Kernel < 6.18.23
- Linux Kernel < 6.19.13
- Linux Kernel 4.13
- Linux Kernel 7.0
Attack profile CVSS 3.1 · 5.5
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/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-2026-31642.md and follow it. Check whether this project is affected by CVE-2026-31642. 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/146d4ab94cf129ee06cd467cb5c71368a6b5bad6
- https://git.kernel.org/stable/c/3be718f659683ad89fad6f1eb66bee99727cae64
- https://git.kernel.org/stable/c/93fc15be44a35b8e3c58d0238ac0d9b7c53465ff
- https://git.kernel.org/stable/c/ac5f54691be06a32246179d41be2d73598036deb
- https://git.kernel.org/stable/c/c63abf25203b50243fe228090526f9dbf37727bd
References
- https://git.kernel.org/stable/c/146d4ab94cf129ee06cd467cb5c71368a6b5bad6
- https://git.kernel.org/stable/c/280efb85e9759881a9d31d0874baa04583cb6c09
- https://git.kernel.org/stable/c/3be718f659683ad89fad6f1eb66bee99727cae64
- https://git.kernel.org/stable/c/3e47a38e584b905359fe0ce5be5165d1e8592a90
- https://git.kernel.org/stable/c/93fc15be44a35b8e3c58d0238ac0d9b7c53465ff
- https://git.kernel.org/stable/c/ac5f54691be06a32246179d41be2d73598036deb
- https://git.kernel.org/stable/c/b15b1ce96777b88989a6a4de8d01efbcd81ad2d7
- https://git.kernel.org/stable/c/c63abf25203b50243fe228090526f9dbf37727bd
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html