Description
When a process calls execve(2) to execute a setuid or setgid image, hwpmc(4) is supposed to detach PMCs owned by unprivileged processes. An inverted check meant that this scenario was not handled properly.

An unprivileged local user who has attached PMCs to a process can continue monitoring it after the process executes a setuid or setgid binary, contrary to the intended policy.
Published: 2026-08-26
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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History

Wed, 26 Aug 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 26 Aug 2026 05:45:00 +0000

Type Values Removed Values Added
First Time appeared Freebsd
Freebsd freebsd
Vendors & Products Freebsd
Freebsd freebsd

Wed, 26 Aug 2026 04:45:00 +0000

Type Values Removed Values Added
Description When a process calls execve(2) to execute a setuid or setgid image, hwpmc(4) is supposed to detach PMCs owned by unprivileged processes. An inverted check meant that this scenario was not handled properly. An unprivileged local user who has attached PMCs to a process can continue monitoring it after the process executes a setuid or setgid binary, contrary to the intended policy.
Title hwpmc fails to detach PMCs during exec credential transitions
Weaknesses CWE-273
References

cve-icon MITRE

Status: PUBLISHED

Assigner: freebsd

Published:

Updated: 2026-08-26T15:24:26.038Z

Reserved: 2026-06-29T01:40:17.498Z

Link: CVE-2026-58089

cve-icon Vulnrichment

Updated: 2026-08-26T15:24:22.691Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-08-26T05:18:12.080

Modified: 2026-08-26T16:54:50.030

Link: CVE-2026-58089

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-26T05:30:18Z

Weaknesses