Race condition in Linux kernel - CVE-2026-72420

Vulnerability identifier: #VU143025

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-2026-72420

CWE-ID: CWE-362

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 a data race in break_stripe_batch_list() and raid5_make_request() in the md/raid5 subsystem when handling overlapping stripe I/O requests. A local user can submit crafted I/O that triggers the R5_Overlap flag race to cause a denial of service.

The issue can leave a task waiting on a bit indefinitely.

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 6.6.0-145.3.31.162
bpftool - update to 6.6.0-145.3.31.162
bpftool-debuginfo - update to 6.6.0-145.3.31.162
kernel-debuginfo - update to 6.6.0-145.3.31.162
kernel-debugsource - update to 6.6.0-145.3.31.162
kernel-devel - update to 6.6.0-145.3.31.162
kernel-extra-modules - update to 6.6.0-145.3.31.162
kernel-headers - update to 6.6.0-145.3.31.162
kernel-source - update to 6.6.0-145.3.31.162
kernel-tools - update to 6.6.0-145.3.31.162
kernel-tools-debuginfo - update to 6.6.0-145.3.31.162
kernel-tools-devel - update to 6.6.0-145.3.31.162
perf - update to 6.6.0-145.3.31.162
perf-debuginfo - update to 6.6.0-145.3.31.162
python3-perf - update to 6.6.0-145.3.31.162
python3-perf-debuginfo - update to 6.6.0-145.3.31.162

• https://git.kernel.org/stable/c/4d919c9b770996365806b6c8d701912d52baa306
• https://git.kernel.org/stable/c/55b77337bdd088c77461588e5ec094421b89911b
• https://git.kernel.org/stable/c/8031b0d02bd221a5f9add4357e291fc2a527b83a
• https://git.kernel.org/stable/c/d684b72dfbd320623ccaab0779aa841190488e7c

• Race condition in Linux kernel md driver
• openEuler 24.03 LTS SP3 update for kernel