SB2026081563 - Improper resource shutdown or release in Linux kernel hw mlx5 driver
Published: August 15, 2026
Security Bulletin ID
SB2026081563
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) Improper resource shutdown or release (CVE-ID: CVE-2026-74396)
CWE-ID: CWE-404 - Improper Resource Shutdown or Release
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 improper resource shutdown or release in the mlx5 RDMA UMR XLT cleanup path when handling an ODP populate failure. A local user can trigger an ODP populate failure to cause a denial of service.
If the emergency XLT page is used, the issue can leave xlt_emergency_page_mutex locked.
Remediation
Install update from vendor's website.