SB2026080612 - Use-after-free in Linux kernel sw rxe driver

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Main Vulnerability Database SB2026080612

SB2026080612 - Use-after-free in Linux kernel sw rxe driver

Published: August 6, 2026

Security Bulletin ID SB2026080612
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

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-2026-64582)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service or execute arbitrary code.

The vulnerability exists due to use-after-free in rxe_mmap in the RDMA/rxe subsystem when processing a memory mapping request concurrently with a DESTROY_CQ ioctl. A local user can trigger a race condition to cause a denial of service or execute arbitrary code.

Exploitation requires winning a narrow race window between the mmap path and concurrent object destruction.


Remediation

Install update from vendor's website.

References