Use-after-free in Linux kernel - CVE-2026-72110

Vulnerability identifier: #VU143480

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-2026-72110

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service or execute arbitrary code.

The vulnerability exists due to a use-after-free in task BPF storage handling in copy_process() and free_task() when handling a fork operation that aborts before task BPF storage is initialized. A local user can trigger a failed fork from a process inserted into a task storage map to cause a denial of service or execute arbitrary code.

Exploitation is reachable when the calling process has been inserted into a task storage map.

Linux kernel
openEuler
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-devel
kernel-extra-modules
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.

Linux kernel - update to 7.0 rc3
kernel - update to 6.6.0-145.3.29.160
bpftool - update to 6.6.0-145.3.29.160
bpftool-debuginfo - update to 6.6.0-145.3.29.160
kernel-debuginfo - update to 6.6.0-145.3.29.160
kernel-debugsource - update to 6.6.0-145.3.29.160
kernel-devel - update to 6.6.0-145.3.29.160
kernel-extra-modules - update to 6.6.0-145.3.29.160
kernel-headers - update to 6.6.0-145.3.29.160
kernel-source - update to 6.6.0-145.3.29.160
kernel-tools - update to 6.6.0-145.3.29.160
kernel-tools-debuginfo - update to 6.6.0-145.3.29.160
kernel-tools-devel - update to 6.6.0-145.3.29.160
perf - update to 6.6.0-145.3.29.160
perf-debuginfo - update to 6.6.0-145.3.29.160
python3-perf - update to 6.6.0-145.3.29.160
python3-perf-debuginfo - update to 6.6.0-145.3.29.160

• https://git.kernel.org/stable/c/43f0005f81b8ce3be962d653cde8db9022f1e9b0
• https://git.kernel.org/stable/c/9b51a6155d14389876916726430da30eabb1d4ed
• https://git.kernel.org/stable/c/9cff220ddb65b022cc668bb652200742476e744c
• https://git.kernel.org/stable/c/c3fd6f28c7ce1142a3b23dbb840eaa4777de1d74
• https://git.kernel.org/stable/c/c4f626ddf2350652ad2f79daf1f10847f3f6eabd

• Use-after-free in Linux kernel task BPF storage handling in copy_process() and free_task()
• openEuler 24.03 LTS SP3 update for kernel