CVE-2026-101308
mediumpriority · track · 0EPSS 0.001 · 0 %ileDENLUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (8)
Products and version ranges known to be affected.
advisories (2)
Vendor and ecosystem advisories describing this.
- NCSC-2026-0452Kwetsbaarheden verholpen in FreeBSD bhyve hypervisorNL2026-10-22csaf · ncsc_nlNL
De FreeBSD community heeft meerdere kwetsbaarheden verholpen in bhyve Hypervisor
- WID-SEC-W-2026-3967FreeBSD Project FreeBSD OS: Mehrere SchwachstellenDeutsch2026-10-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in FreeBSD Project FreeBSD OS ausnutzen, um beliebigen Programmcode auszuführen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen und um Sicherheitsvorkehrungen zu umgehen.
sources
Which sources assert this record, and when.
references (1) nvd
External citations — patches, advisories, analysis.
- https://security.freebsd.org/advisories/FreeBSD-SA-26:71.sound.ascPatchVendor Advisory
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