SB2026052210 - Double free in Linux kernel rds
Published: May 22, 2026
Security Bulletin ID
SB2026052210
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Double free (CVE-ID: CVE-2026-43494)
CWE-ID: CWE-415 - Double Free
CVSSv4: 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/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a double free in rds_message_zcopy_from_user() and rds_message_purge() when handling a zerocopy page pin failure during sendmsg processing. A local user can trigger a page pin failure and subsequent cleanup to cause a denial of service.
Remediation
Install update from vendor's website.