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CVE-2026-80663

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

HIGH
7.1
CVSS Score
Published: August 28, 2026 at 06:49 AM UTC
Updated: October 16, 2026 at 08:18 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.1
Exploit prediction
EPSS 0.1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
5.187fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6
Vendor states this is fixed in 19ffeb30fdfce63f8d6aca71bcdddb3f69d46278 (fixed)
Vendor states this is fixed in 607af438e6430893a822964c841a1994b33acccc (fixed)
Vendor states this is fixed in 72a07abc6b9046f07a08bba353cad7667bcc9dce (fixed)
Vendor states this is fixed in 905493a6338c82a70da16f86e0a6215db5a3d73d (fixed)
Vendor states this is fixed in db938eb9a3c1317596c28e94413b33426508d51b (fixed)
Vendor states this is fixed in e8adac69d1bdf035ef97cc914e845acd4ef08e28 (fixed)
Vendor states this is fixed in 5.18 (unaffected)
Vendor states this is fixed in 6.1.178 (unaffected)
Vendor states this is fixed in 6.12.97 (unaffected)
Vendor states this is fixed in 6.18.40 (unaffected)
Vendor states this is fixed in 6.6.145 (unaffected)
Vendor states this is fixed in 7.1.5 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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