CVE-2026-58089
hwpmc fails to detach PMCs during exec credential transitions
- State
- Published
- Severity
- 7.8 High
- Published
- Aug 26, 2026
- Updated
- Aug 26, 2026
- Reserved
- Jun 29, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-273 Improper Check for Dropped Privileges
Affected Products
| Product | Versions |
|---|---|
FreeBSDFreeBSD |
|
References
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