SB2026081564 - Improper resource shutdown or release in Linux kernel hw mlx5 driver
Published: August 15, 2026
Security Bulletin ID
SB2026081564
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) Improper resource shutdown or release (CVE-ID: CVE-2026-74397)
CWE-ID: CWE-404 - Improper Resource Shutdown or Release
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 improper resource shutdown or release in mlx5_ib_alloc_transport_domain() when handling transport-domain allocation failures during loopback enablement. A local user can trigger an error path that leaks a transport domain to cause a denial of service.
The issue affects the IB/mlx5 driver in the Linux kernel.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/2c3b2667dad69d56774b79db763acb3a1bee0fc0
- https://git.kernel.org/stable/c/37fc3cc0f924fd8d0f0cf87b92672dec75a32e57
- https://git.kernel.org/stable/c/65e344925fa30abf50c8de8c150b397715fa2066
- https://git.kernel.org/stable/c/e79389115b9d27287ff6230a9750675106ed7668
- https://git.kernel.org/stable/c/f88e12c95fc19f719e06ca1e9eb20fdad68ef61a