SB2026072128 - Use-after-free in Linux kernel rpmsg driver

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Main Vulnerability Database SB2026072128

SB2026072128 - Use-after-free in Linux kernel rpmsg driver

Published: July 21, 2026

Security Bulletin ID SB2026072128
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-2026-63797)

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 use-after-free in rpmsg_chrdev_probe() and the rpmsg character device endpoint callback handling in drivers/rpmsg/rpmsg_char.c when processing callbacks during a probe error path. A local user can trigger endpoint creation failure and concurrent callback handling to cause a denial of service.

The issue occurs because the default endpoint's priv pointer can reference freed memory before endpoint setup has completed.


Remediation

Install update from vendor's website.

References