tools/power/x86/intel-speed-select: Harden daemon pidfile open (CVE-2026-80663) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80663

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

Answer in brief

CVE-2026-80663 records a Unknown severity vulnerability in tools/power/x86/intel-speed-select: Harden daemon pidfile open. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 28, 2026Updated Aug 28, 2026Source checked Aug 28, 2026First seen by HOL Aug 28, 2026Material review Aug 28, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 <905493a6338c82a70da16f86e0a6215db5a3d73d \|\| >=7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 <db938eb9a3c1317596c28e94413b33426508d51b \|\| >=7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 <72a07abc6b9046f07a08bba353cad7667bcc9dce \|\| >=7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 <19ffeb30fdfce63f8d6aca71bcdddb3f69d46278 \|\| >=7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 <e8adac69d1bdf035ef97cc914e845acd4ef08e28 \|\| >=7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6 <607af438e6430893a822964c841a1994b33acccc	905493a6338c82a70da16f86e0a6215db5a3d73d, db938eb9a3c1317596c28e94413b33426508d51b, 72a07abc6b9046f07a08bba353cad7667bcc9dce, 19ffeb30fdfce63f8d6aca71bcdddb3f69d46278, e8adac69d1bdf035ef97cc914e845acd4ef08e28, 607af438e6430893a822964c841a1994b33acccc
Linux/Linuxgeneric	5.18	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 905493a6338c82a70da16f86e0a6215db5a3d73d if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 28, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.