{"id":"CVE-2026-80663","summary":"tools/power/x86/intel-speed-select: Harden daemon pidfile open","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ntools/power/x86/intel-speed-select: Harden daemon pidfile open\n\nAvoid symlink-based pidfile clobbering by opening the pidfile with\nO_NOFOLLOW and validating it with fstat() before locking/writing.\n\nThe daemon currently uses a fixed pidfile path under /tmp. A local\nunprivileged user can pre-create a symlink at that path and cause a\nroot-run daemon instance to write into an attacker-chosen file.","modified":"2026-08-31T03:30:39.456763936Z","published":"2026-08-28T06:49:06.882Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80663.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/19ffeb30fdfce63f8d6aca71bcdddb3f69d46278"},{"type":"WEB","url":"https://git.kernel.org/stable/c/607af438e6430893a822964c841a1994b33acccc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/72a07abc6b9046f07a08bba353cad7667bcc9dce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/905493a6338c82a70da16f86e0a6215db5a3d73d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/db938eb9a3c1317596c28e94413b33426508d51b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e8adac69d1bdf035ef97cc914e845acd4ef08e28"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80663.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80663"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6"},{"fixed":"905493a6338c82a70da16f86e0a6215db5a3d73d"},{"fixed":"db938eb9a3c1317596c28e94413b33426508d51b"},{"fixed":"72a07abc6b9046f07a08bba353cad7667bcc9dce"},{"fixed":"19ffeb30fdfce63f8d6aca71bcdddb3f69d46278"},{"fixed":"e8adac69d1bdf035ef97cc914e845acd4ef08e28"},{"fixed":"607af438e6430893a822964c841a1994b33acccc"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80663.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.18.0"},{"fixed":"6.1.178"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80663.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"}]}