SB20260812199 - Use-after-free in Linux kernel rds

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Main Vulnerability Database SB20260812199

SB20260812199 - Use-after-free in Linux kernel rds

Published: August 12, 2026

Security Bulletin ID SB20260812199
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-2026-68335)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to trigger a use-after-free and potentially execute arbitrary code.

The vulnerability exists due to use-after-free in the RDS receive path when delivering an incoming message across network namespace boundaries. A local user can create network namespaces and send a crafted message to trigger a dangling connection reference and potentially execute arbitrary code.

The issue is reachable from unprivileged user namespaces using CLONE_NEWUSER and CLONE_NEWNET.


Remediation

Install update from vendor's website.

References