SB20260815247 - Use-after-free in Linux kernel sunrpc xprtrdma

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260815247

SB20260815247 - Use-after-free in Linux kernel sunrpc xprtrdma

Published: August 15, 2026

Security Bulletin ID SB20260815247
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-72473)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a use-after-free in the xprtrdma request handling logic when processing RPC-over-RDMA send and reply completion. A local user can trigger request reuse while the HCA is still DMA-reading from its send buffer to cause a denial of service.

The issue occurs for Sends carrying only pre-registered buffers, where the request could be returned to the free pool before Send-side completion.


Remediation

Install update from vendor's website.

References