SB2026042571 - Missing Release of Resource after Effective Lifetime in Linux kernel rxrpc
Published: April 25, 2026
Security Bulletin ID
SB2026042571
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-31639)
CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a reference count leak in rxrpc_alloc_client_call() and rxrpc_destroy_call() when creating and destroying a client call. A local user can trigger client call creation to cause a denial of service.
Remediation
Install update from vendor's website.
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