SB20260816304 - Use-after-free in Linux kernel sunrpc

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Main Vulnerability Database SB20260816304

SB20260816304 - Use-after-free in Linux kernel sunrpc

Published: August 16, 2026

Security Bulletin ID SB20260816304
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-72222)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause memory corruption.

The vulnerability exists due to a use-after-free in the sunrpc TLS handshake callback handling in svc_tcp_handshake() and svc_tcp_handshake_done() when a connection close overlaps an asynchronous TLS handshake. A remote attacker can trigger a connection close during the TLS handshake to cause memory corruption.

The issue is reachable on TLS-enabled NFS servers, and signal delivery during the interruptible wait can trigger the affected race window.


Remediation

Install update from vendor's website.

References