NULL pointer dereference in Linux kernel - CVE-2026-31443

Vulnerability identifier: #VU127710

CSH Severity: Low

CVSS v4: 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]

CVE-ID: CVE-2026-31443

CWE-ID: CWE-476

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 handling of unallocated memory in the idxd driver event log handling when processing hardware errors that trigger function level reset. A local user can trigger such an error condition to cause a denial of service.

Only systems where reporting errors to the event log is not supported by the hardware are vulnerable.

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

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
python3-perf-debuginfo - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
python3-perf - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
perf-debuginfo - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
perf - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-tools-devel - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-tools-debuginfo - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-tools - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-source - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-headers - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-devel - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-debugsource - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-debuginfo - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
bpftool-debuginfo - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
bpftool - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel - addressed in versions 6.6.0-145.1.19.156, 6.6.0-145.3.17.150
kernel-extra-modules - update to 6.6.0-145.3.17.150

• https://git.kernel.org/stable/c/0e761079d653c25f838380cf7cef2730832110cc
• https://git.kernel.org/stable/c/52d2edea0d63c935e82631e4b9e4a94eccf97b5b
• https://git.kernel.org/stable/c/aa0ffc6d3990ec35976308a068dc23178037e564

• NULL pointer dereference in Linux kernel dma idxd driver
• openEuler 24.03 LTS SP3 update for kernel
• openEuler 24.03 LTS SP1 update for kernel