SB20260816491 - Memory leak in Linux kernel steering hws driver
Published: August 16, 2026
Security Bulletin ID
SB20260816491
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-72032)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a memory leak in hws_bwc_matcher_move() in the mlx5 HWS matcher handling code when setting a resize target after allocating a replacement matcher. A local user can trigger a resize-target setup failure to cause a denial of service.
Exploitation requires access to an environment using mlx5 HWS-capable functionality.
Remediation
Install update from vendor's website.