Vulnerability Details CVE-2026-31639
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: Fix key reference count leak from call->key
When creating a client call in rxrpc_alloc_client_call(), the code obtains
a reference to the key. This is never cleaned up and gets leaked when the
call is destroyed.
Fix this by freeing call->key in rxrpc_destroy_call().
Before the patch, it shows the key reference counter elevated:
$ cat /proc/keys | grep afs@54321
1bffe9cd I--Q--i 8053480 4169w 3b010000 1000 1000 rxrpc afs@54321: ka
$
After the patch, the invalidated key is removed when the code exits:
$ cat /proc/keys | grep afs@54321
$
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 2.3%
CVSS Severity
CVSS v3 Score 5.5
References
- https://git.kernel.org/stable/c/2e6ef713b1598f6acd7f302fa6b12b6731c89914
- https://git.kernel.org/stable/c/978108902ee4ef2b348ff7ec36ad014dc5bc6dc6
- https://git.kernel.org/stable/c/d666540d217e8d420544ebdfbadeedd623562733
- https://git.kernel.org/stable/c/e6b7943c5dc875647499da09bf4d50a8557ab0c3
- https://git.kernel.org/stable/c/f1a7a3ab0f35f83cf11bba906b9e948cf3788c28
Products affected by CVE-2026-31639
-
cpe:2.3:o:linux:linux_kernel:6.2
-
cpe:2.3:o:linux:linux_kernel:7.0