SB20260815233 - Race condition in Linux kernel hw bnxt_re driver

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2026-72495)

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 bnxt_re RDMA ucontext WC page allocation handler when processing repeated concurrent requests to allocate WC pages for the same ucontext. A local user can send repeated allocation requests to cause a denial of service.

Only one WC page per ucontext is supported.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/441baa79043431807115fd030d7d0bb14ed441a0
• https://git.kernel.org/stable/c/478c4d24193fe3e6aa2accd4874ae43000e4a217
• https://git.kernel.org/stable/c/da406b8b49c1dfe661a497483940d7ee781430db