An unprivileged local user with access to a sound device can exploit this race to trigger a use-after-free in the kernel, potentially escalating privileges.
Analysis
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Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FreeBSD | FreeBSD | unknown |
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Tracking
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Thu, 15 Oct 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
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Thu, 15 Oct 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | When an audio channel's buffer needs to be resized, the sound(4) driver checks that the buffer is not memory-mapped and then drops the channel lock to allocate a new buffer. An mmap(2) call on another thread can complete during this window, after which the resize path frees the now-mapped buffer without rechecking. An unprivileged local user with access to a sound device can exploit this race to trigger a use-after-free in the kernel, potentially escalating privileges. | |
| Title | TOCTOU race between sound(4) buffer resizing and mmap | |
| Weaknesses | CWE-367 | |
| References |
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: freebsd
Published:
Updated: 2026-10-15T15:40:12.607Z
Reserved: 2026-09-28T13:33:02.323Z
Link: CVE-2026-101308
Vulnrichment
Updated: 2026-10-15T15:40:06.953Z
NVD
Status : Awaiting Analysis
Published: 2026-10-15T07:17:58.007
Modified: 2026-10-15T16:17:41.437
Link: CVE-2026-101308
Redhat
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OpenCVE Enrichment
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CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition