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intel-speed-select CVE-2026-80663

| EUVDEUVD-2026-67539 HIGH
2026-08-28 Linux GHSA-3m25-qfr7-c9r2
Intel Information Disclosure Linux Red Hat Suse
7.1
CVSS 3.1 · Vendor: Linux
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Severity by source

Vendor (Linux) PRIMARY
7.1 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
vuln.today AI
7.1 HIGH

Local-only attack requiring a shell account (PR:L, AV:L); no confidentiality impact; integrity and availability both High as root overwrites attacker-chosen files.

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
7.0 MEDIUM
qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Aug 29, 2026 - 07:49 vuln.today
CVSS changed
Aug 29, 2026 - 07:22 NVD
7.1 (HIGH)
Patch available
Aug 28, 2026 - 09:02 EUVD
CVE Published
Aug 28, 2026 - 06:49 cve.org
HIGH 7.1
CVE Published
Aug 28, 2026 - 06:49 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

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.

AnalysisAI

Symlink-based file clobbering in the Linux kernel's intel-speed-select daemon allows a local low-privileged user to redirect root-process writes to an attacker-chosen file by pre-positioning a symlink at the daemon's fixed /tmp pidfile path. Affected systems are those running Linux 5.18 through unpatched 6.x and 7.x branches on Intel Speed Select Technology hardware with the daemon active. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires a local shell account with at least standard user privileges (PR:L) on a system where the intel-speed-select daemon is actively running as root - this daemon is specific to Intel hardware with Speed Select Technology and is not present in default general-purpose Linux deployments. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 score of 7.1 (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H) accurately reflects the attack profile: local access with low privileges and no user interaction required, with high integrity and availability impact because the root-running daemon can be redirected to overwrite an arbitrary file. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to a patched Linux kernel version: 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5, or 7.2, which apply the O_NOFOLLOW and fstat() validation fix to the intel-speed-select daemon. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify and inventory all systems running the intel-speed-select daemon on Linux 5.18 through 7.x kernel branches. …

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Threat intelligence, references, and detailed analysis are available after sign-in.

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 16.0 Affected

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CVE-2026-80663 vulnerability details – vuln.today
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