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.
On a system with a multiple audio devices, an unprivileged local user can exploit this use-after-free to escalate privileges.
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History
Wed, 26 Aug 2026 05:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Kernel use-after-free via the SNDCTL_DSP_SYNCSTART ioctl | |
| Weaknesses | CWE-416 | |
| References |
|
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MITRE
Status: PUBLISHED
Assigner: freebsd
Published:
Updated: 2026-08-26T04:38:19.487Z
Reserved: 2026-06-29T01:40:17.498Z
Link: CVE-2026-58091
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
Updated: 2026-08-26T06:30:16Z
Weaknesses