Out-of-bounds read in Linux kernel - CVE-2026-72450

Vulnerability identifier: #VU142999

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-2026-72450

CWE-ID: CWE-125

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local attacker to cause a denial of service.

The vulnerability exists due to an out-of-bounds shift in xfrm_selector_match and address matching helpers when processing xfrm selector matching with an AF_UNSPEC selector and an oversized prefix length. A local attacker can provide a crafted selector with a mismatched family or excessive prefix length to cause a denial of service.

The issue can be triggered when an AF_UNSPEC selector is matched against an IPv4 flow while XFRM_STATE_AF_UNSPEC is set.

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 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
python3-perf - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
perf-debuginfo - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
perf - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools-devel - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools-debuginfo - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-tools - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-source - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-headers - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-devel - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-debugsource - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-debuginfo - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
bpftool-debuginfo - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
bpftool - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel - addressed in versions 6.6.0-145.1.24.161, 6.6.0-145.3.29.160
kernel-extra-modules - update to 6.6.0-145.3.29.160

• https://git.kernel.org/stable/c/40f0b1047918539f0b0f795ac65e35336b4c2c78
• https://git.kernel.org/stable/c/5a03a2ee17e8259dde631ed84fd8322db06cb2ae
• https://git.kernel.org/stable/c/6d99379c58f7f1c6ab2cc7aba01a4f52d71adcfe
• https://git.kernel.org/stable/c/78783fefdc8f36879b1a17efa0d3195ea5f2dc5f
• https://git.kernel.org/stable/c/87a5bbccc7ff4edb3f42fea387124237d2ba91ee
• https://git.kernel.org/stable/c/a3968ad4195d72c8fddcc6c0ef39da95ac98711a
• https://git.kernel.org/stable/c/bd7f202cf77556cff59f68dc30e4cdf40cb6e33b
• https://git.kernel.org/stable/c/efa9e3b9f3dea2e1ea4c7edf4edc863faef85986

• Out-of-bounds read in Linux kernel xfrm
• openEuler 24.03 LTS SP3 update for kernel
• openEuler 24.03 LTS SP1 update for kernel