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CVE-2026-80663

HIGHCVSS 7.1/10EPSS 0.17%

Last modified

CVE-2026-80663 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.1/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS Probability
0.17%

6.8th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6, < 905493a6338c82a70da16f86e0a6215db5a3d73d; >= 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6, < db938eb9a3c1317596c28e94413b33426508d51b; >= 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6, < 72a07abc6b9046f07a08bba353cad7667bcc9dce; >= 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6, < 19ffeb30fdfce63f8d6aca71bcdddb3f69d46278; >= 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6, < e8adac69d1bdf035ef97cc914e845acd4ef08e28; >= 7fd786dfbd2c55ddee3b87f33c82f1c58bdb1dd6, < 607af438e6430893a822964c841a1994b33acccc
LinuxLinux5.18

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is 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.
How severe is CVE-2026-80663?
CVE-2026-80663 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-80663?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST