CVE-2026-58091 — HIGH (7.8)

Vulnerability Description

The implementation of this ioctl attempts to acquire locks on all channels in a sync group. If locking a channel would block, it releases the sync group list lock and sleeps. Upon reawakening, it is possible that the sync group structure is freed, but the implementation did not handle this possibility. On a system with a multiple audio devices, an unprivileged local user can exploit this use-after-free to escalate privileges.

CVSS Score

7.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-416

References

https://security.freebsd.org/advisories/FreeBSD-SA-26:58.sound.asc

FAQ

What is CVE-2026-58091?

CVE-2026-58091 is a vulnerability with a CVSS score of 7.8 (HIGH). The implementation of this ioctl attempts to acquire locks on all channels in a sync group. If locking a channel would block, it releases the sync group list lock and sleeps. Upon reawakening, it is...

How severe is CVE-2026-58091?

CVE-2026-58091 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-58091?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.