{"api_version":"1","generated_at":"2026-08-28T14:43:08+00:00","cve":"CVE-2026-80663","urls":{"html":"https://cve.report/CVE-2026-80663","api":"https://cve.report/api/cve/CVE-2026-80663.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80663","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80663"},"summary":{"title":"tools/power/x86/intel-speed-select: Harden daemon pidfile open","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:51","updated_at":"2026-08-28 08:16:51"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/607af438e6430893a822964c841a1994b33acccc","name":"https://git.kernel.org/stable/c/607af438e6430893a822964c841a1994b33acccc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/72a07abc6b9046f07a08bba353cad7667bcc9dce","name":"https://git.kernel.org/stable/c/72a07abc6b9046f07a08bba353cad7667bcc9dce","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e8adac69d1bdf035ef97cc914e845acd4ef08e28","name":"https://git.kernel.org/stable/c/e8adac69d1bdf035ef97cc914e845acd4ef08e28","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/db938eb9a3c1317596c28e94413b33426508d51b","name":"https://git.kernel.org/stable/c/db938eb9a3c1317596c28e94413b33426508d51b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/19ffeb30fdfce63f8d6aca71bcdddb3f69d46278","name":"https://git.kernel.org/stable/c/19ffeb30fdfce63f8d6aca71bcdddb3f69d46278","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/905493a6338c82a70da16f86e0a6215db5a3d73d","name":"https://git.kernel.org/stable/c/905493a6338c82a70da16f86e0a6215db5a3d73d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80663","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80663","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 905493a6338c82a70da16f86e0a6215db5a3d73d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 db938eb9a3c1317596c28e94413b33426508d51b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 72a07abc6b9046f07a08bba353cad7667bcc9dce git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 19ffeb30fdfce63f8d6aca71bcdddb3f69d46278 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 e8adac69d1bdf035ef97cc914e845acd4ef08e28 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 607af438e6430893a822964c841a1994b33acccc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["tools/power/x86/intel-speed-select/isst-daemon.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"905493a6338c82a70da16f86e0a6215db5a3d73d","status":"affected","version":"7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6","versionType":"git"},{"lessThan":"db938eb9a3c1317596c28e94413b33426508d51b","status":"affected","version":"7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6","versionType":"git"},{"lessThan":"72a07abc6b9046f07a08bba353cad7667bcc9dce","status":"affected","version":"7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6","versionType":"git"},{"lessThan":"19ffeb30fdfce63f8d6aca71bcdddb3f69d46278","status":"affected","version":"7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6","versionType":"git"},{"lessThan":"e8adac69d1bdf035ef97cc914e845acd4ef08e28","status":"affected","version":"7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6","versionType":"git"},{"lessThan":"607af438e6430893a822964c841a1994b33acccc","status":"affected","version":"7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["tools/power/x86/intel-speed-select/isst-daemon.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.18"},{"lessThan":"5.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"5.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-08-28T06:49:06.882Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/905493a6338c82a70da16f86e0a6215db5a3d73d"},{"url":"https://git.kernel.org/stable/c/db938eb9a3c1317596c28e94413b33426508d51b"},{"url":"https://git.kernel.org/stable/c/72a07abc6b9046f07a08bba353cad7667bcc9dce"},{"url":"https://git.kernel.org/stable/c/19ffeb30fdfce63f8d6aca71bcdddb3f69d46278"},{"url":"https://git.kernel.org/stable/c/e8adac69d1bdf035ef97cc914e845acd4ef08e28"},{"url":"https://git.kernel.org/stable/c/607af438e6430893a822964c841a1994b33acccc"}],"title":"tools/power/x86/intel-speed-select: Harden daemon pidfile open","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80663","datePublished":"2026-08-28T06:49:06.882Z","dateReserved":"2026-08-26T14:34:25.781Z","dateUpdated":"2026-08-28T06:49:06.882Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:51","lastModifiedDate":"2026-08-28 08:16:51","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80663","Ordinal":"1","Title":"tools/power/x86/intel-speed-select: Harden daemon pidfile open","CVE":"CVE-2026-80663","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80663","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"tools/power/x86/intel-speed-select: Harden daemon pidfile open"}]}}}