SB2026081635 - Race condition in Linux kernel core ipoib driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-72341)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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 a race condition in the mlx5 driver channel statistics handling when reading netdevice statistics concurrently with channel initialization. A local user can trigger concurrent statistics queries to cause a denial of service.

The issue can lead to a NULL pointer dereference on weakly ordered architectures such as ARM, PowerPC, and RISC-V during NIC bringup.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5a799714e8ca0bce9ea40694f49914cf1adbbaa9
• https://git.kernel.org/stable/c/5c7e3755abf663f033de24f917b77685e9543045
• https://git.kernel.org/stable/c/815515ec68f527ca755cb1e2c1ff9148f6b3ea56