7.8

CVE-2026-58089

hwpmc fails to detach PMCs during exec credential transitions

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Freebsd ≫ Freebsd Version 14.4 Update p1
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Freebsd ≫ Freebsd Version 15.1 Update p1
Freebsd ≫ Freebsd Version 15.1 Update p2
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.02
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
CISA-ADP 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-273 Improper Check for Dropped Privileges

The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.

https://security.freebsd.org/advisories/FreeBSD-SA-26:56.hwpmc.asc
Vendor Advisory