Improper privilege management in Linux kernel - CVE-2026-80560

Vulnerability identifier: #VU145936

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-80560

CWE-ID: CWE-269

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to escalate privileges.

The vulnerability exists due to improper access control in restore_sigcontext() in the openrisc signal handling code when returning from a signal handler through a crafted sigframe. A local user can craft a sigframe that modifies privileged SR bits to escalate privileges.

By clearing SPR_SR_DME, data accesses can occur without MMU translation or protection, enabling read and write access to arbitrary physical memory.

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/212fc482ddd7f9ccdd74a05eab1cac849350dcd6
• https://git.kernel.org/stable/c/32ef1b30ad736519f7a207bcc2986f3d4129d972
• https://git.kernel.org/stable/c/89a91b30685c0493b0fa2b47d0ab41061a63069d
• https://git.kernel.org/stable/c/a88d688be8d7f03cbf927f2ab454ea9fa58d2979
• https://git.kernel.org/stable/c/b4d73c3848bae9084fa8b9b2aa76d99a7d8eb17d
• https://git.kernel.org/stable/c/bc2e24ba6e167ccf374a197457aa5640a802f429
• https://git.kernel.org/stable/c/cd8b43a71755c516f5c1f265a103438ae9ab15be
• https://git.kernel.org/stable/c/cf1b5514ddf9df098ce7e3741fc9679fd85a4ec6

• Improper privilege management in Linux kernel openrisc kernel
• openEuler 24.03 LTS SP3 update for kernel