CVE-2026-80663

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/19ffeb30fdfce63f8d6aca71bcdddb3f69d46278
https://git.kernel.org/stable/c/607af438e6430893a822964c841a1994b33acccc
https://git.kernel.org/stable/c/72a07abc6b9046f07a08bba353cad7667bcc9dce
https://git.kernel.org/stable/c/905493a6338c82a70da16f86e0a6215db5a3d73d
https://git.kernel.org/stable/c/db938eb9a3c1317596c28e94413b33426508d51b
https://git.kernel.org/stable/c/e8adac69d1bdf035ef97cc914e845acd4ef08e28

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-28 08:16

Updated : 2026-08-29 07:16

NVD link : CVE-2026-80663

Mitre link : CVE-2026-80663

CVE.ORG link : CVE-2026-80663

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-80663", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 5.2, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6", "lessThan": "905493a6338c82a70da16f86e0a6215db5a3d73d", "versionType": "git"}, {"status": "affected", "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6", "lessThan": "db938eb9a3c1317596c28e94413b33426508d51b", "versionType": "git"}, {"status": "affected", "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6", "lessThan": "72a07abc6b9046f07a08bba353cad7667bcc9dce", "versionType": "git"}, {"status": "affected", "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6", "lessThan": "19ffeb30fdfce63f8d6aca71bcdddb3f69d46278", "versionType": "git"}, {"status": "affected", "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6", "lessThan": "e8adac69d1bdf035ef97cc914e845acd4ef08e28", "versionType": "git"}, {"status": "affected", "version": "7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6", "lessThan": "607af438e6430893a822964c841a1994b33acccc", "versionType": "git"}], "programFiles": ["tools/power/x86/intel-speed-select/isst-daemon.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"status": "unaffected", "version": "0", "lessThan": "5.18", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["tools/power/x86/intel-speed-select/isst-daemon.c"], "defaultStatus": "affected"}]}], "published": "2026-08-28T08:16:51.503", "references": [{"url": "https://git.kernel.org/stable/c/19ffeb30fdfce63f8d6aca71bcdddb3f69d46278", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/607af438e6430893a822964c841a1994b33acccc", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/72a07abc6b9046f07a08bba353cad7667bcc9dce", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/905493a6338c82a70da16f86e0a6215db5a3d73d", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/db938eb9a3c1317596c28e94413b33426508d51b", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e8adac69d1bdf035ef97cc914e845acd4ef08e28", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "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."}], "lastModified": "2026-08-29T07:16:48.797", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}