SB20260912272 - Use-after-free in Linux kernel hw cxgb4 driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-89510)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to cause a use-after-free condition.

The vulnerability exists due to a race condition in the RDMA/cxgb4 device removal and registration work handling when removing an RDMA device while registration work is pending or running. A local privileged user can remove the device while the registration work accesses the device object to cause a use-after-free condition.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/320e5258a53af0abc5abd9eb01519a48bab2dee8
• https://git.kernel.org/stable/c/85f438382a865a4dc4c50e6b884310bb2b60fc4d
• https://git.kernel.org/stable/c/a7100601aa1a39f799a566acce10db20eaf4b7f2
• https://git.kernel.org/stable/c/fe9c591026c576d8b1f72aab5e4cd67350530763