CVE-2026-58089

hwpmc fails to detach PMCs during exec credential transitions

Published Aug 26, 2026 CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
CPEs cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:14.4:p8:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p10:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p11:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p12:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p7:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p8:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.0:p9:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.1:p1:*:*:*:*:*:*
cpe:2.3:o:freebsd:freebsd:15.1:p2:*:*:*:*:*:*
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'}

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

Sources

Status
PUBLISHED
Assigner
freebsd
Published
Updated
Aug 26, 2026, 3:24 PM
Reserved
Jun 29, 2026, 1:40 AM
Status
Analyzed
Published
Aug 26, 2026, 5:18 AM
Modified
Sep 24, 2026, 2:06 PM