Improper resource shutdown or release in Linux kernel - CVE-2026-74397

Vulnerability identifier: #VU142733

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-74397

CWE-ID: CWE-404

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
openEuler
python3-perf-debuginfo
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-headers
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python3-perf
kernel-extra-modules

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
python3-perf-debuginfo - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
bpftool - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
bpftool-debuginfo - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-debuginfo - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-debugsource - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-devel - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-headers - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-source - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools-debuginfo - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools-devel - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
perf - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
perf-debuginfo - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
python3-perf - addressed in versions 5.10.0-331.0.0.232, 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-extra-modules - update to 6.6.0-145.3.29.160

• 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

• Improper resource shutdown or release in Linux kernel hw mlx5 driver
• openEuler 24.03 LTS SP3 update for kernel
• openEuler 24.03 LTS SP1 update for kernel
• openEuler 22.03 LTS SP4 update for kernel