Use-after-free in Linux kernel - CVE-2026-89510

Vulnerability identifier: #VU149294

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-89510

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
openEuler
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
python3-perf-debuginfo

Install security update from vendor's repository.

kernel - update to 5.10.0-335.0.0.236
bpftool - update to 5.10.0-335.0.0.236
bpftool-debuginfo - update to 5.10.0-335.0.0.236
kernel-debuginfo - update to 5.10.0-335.0.0.236
kernel-debugsource - update to 5.10.0-335.0.0.236
kernel-devel - update to 5.10.0-335.0.0.236
kernel-headers - update to 5.10.0-335.0.0.236
kernel-source - update to 5.10.0-335.0.0.236
kernel-tools - update to 5.10.0-335.0.0.236
kernel-tools-debuginfo - update to 5.10.0-335.0.0.236
kernel-tools-devel - update to 5.10.0-335.0.0.236
perf - update to 5.10.0-335.0.0.236
perf-debuginfo - update to 5.10.0-335.0.0.236
python3-perf - update to 5.10.0-335.0.0.236
python3-perf-debuginfo - update to 5.10.0-335.0.0.236

• 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

• Use-after-free in Linux kernel hw cxgb4 driver
• openEuler 22.03 LTS SP4 update for kernel