Improper control of a resource through its lifetime in Linux kernel - CVE-2026-72108

Vulnerability identifier: #VU143478

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-72108

CWE-ID: CWE-664

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause metadata inconsistency and a denial of service.

The vulnerability exists due to improper state management in dm-thin metadata snapshot handling in drivers/md/dm-thin-metadata.c when reserving or releasing a metadata snapshot and a subsequent metadata commit fails. A local user can issue crafted dmsetup messages to trigger a commit failure and cause metadata inconsistency and a denial of service.

Exploitation requires the ability to manage a thin-pool metadata device and trigger snapshot reserve or release operations under commit-failure conditions.

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.

Linux kernel - update to 7.0 rc3
kernel - update to 5.10.0-334.0.0.235
bpftool - update to 5.10.0-334.0.0.235
bpftool-debuginfo - update to 5.10.0-334.0.0.235
kernel-debuginfo - update to 5.10.0-334.0.0.235
kernel-debugsource - update to 5.10.0-334.0.0.235
kernel-devel - update to 5.10.0-334.0.0.235
kernel-headers - update to 5.10.0-334.0.0.235
kernel-source - update to 5.10.0-334.0.0.235
kernel-tools - update to 5.10.0-334.0.0.235
kernel-tools-debuginfo - update to 5.10.0-334.0.0.235
kernel-tools-devel - update to 5.10.0-334.0.0.235
perf - update to 5.10.0-334.0.0.235
perf-debuginfo - update to 5.10.0-334.0.0.235
python3-perf - update to 5.10.0-334.0.0.235
python3-perf-debuginfo - update to 5.10.0-334.0.0.235

• https://git.kernel.org/stable/c/3dc9ae1029320d77472c44965e572f176949cd63
• https://git.kernel.org/stable/c/4af993468193cf4cd32ba5748786e7801945f7d2
• https://git.kernel.org/stable/c/5bcd4d3058ebaf46ad2e163829d87dd4870c7a45
• https://git.kernel.org/stable/c/5efb1a7734ed4035fa4fdc3716bdb84621f27cf6
• https://git.kernel.org/stable/c/7f76245960a332f39b08cc556e675d1765dc5bbb
• https://git.kernel.org/stable/c/9f1a0d27586ceab055e6b050e3731ce3c6b2c4f0
• https://git.kernel.org/stable/c/abf2fae92cbe68945028987d498cc72f8f0e23a8
• https://git.kernel.org/stable/c/b5f9a31c51cbb374a1713c3494f8660ab070f035

• Improper control of a resource through its lifetime in Linux kernel md driver
• openEuler 22.03 LTS SP4 update for kernel