CVE-2026-80663

Summary

In the Linux kernel, the following vulnerability has been resolved:

tools/power/x86/intel-speed-select: Harden daemon pidfile open

Avoid symlink-based pidfile clobbering by opening the pidfile with O_NOFOLLOW and validating it with fstat() before locking/writing.

The daemon currently uses a fixed pidfile path under /tmp. A local unprivileged user can pre-create a symlink at that path and cause a root-run daemon instance to write into an attacker-chosen file.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 < 905493a6338c82a70da16f86e0a6215db5a3d73daffected
LinuxLinux7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 < db938eb9a3c1317596c28e94413b33426508d51baffected
LinuxLinux7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 < 72a07abc6b9046f07a08bba353cad7667bcc9dceaffected
LinuxLinux7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 < 19ffeb30fdfce63f8d6aca71bcdddb3f69d46278affected
LinuxLinux7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 < e8adac69d1bdf035ef97cc914e845acd4ef08e28affected
LinuxLinux7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 < 607af438e6430893a822964c841a1994b33accccaffected
LinuxLinux5.18affected
LinuxLinux0 < 5.18unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.97 <= 6.12.*unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References