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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-58091

Kernel use-after-free via the SNDCTL_DSP_SYNCSTART ioctl

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Status
Published
Published
Updated
Assigning organization
freebsd

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

FreeBSD FreeBSD

Default version status: unknown

  • 15.1-RELEASE to < p3affected
  • 15.0-RELEASE to < p13affected
  • 14.4-RELEASE to < p9affected

References