Buffer overflow in FreeBSD
CVE-2026-101310
The HDA audio device model did not check for zero-length Buffer Descriptor List (BDL) entries when starting a stream. A zero-length entry caused an out-of-bounds read or write during DMA transfer processing. BDL fields were also subject to modification by the guest after validation. A malicious guest can crash the bhyve process or potentially execute arbitrary code in the host userspace context running the virtual machine, subject to bhyve's Capsicum sandbox.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- security.freebsd.org/advisories/FreeBSD-SA-26:72.bhyve.asc (vendor-advisory)
Frequently asked questions
- What is CVE-2026-101310?
- CVE-2026-101310 is a high-severity vulnerability in FreeBSD, classified under Buffer Over-read. CVSS score: 7.0/10. Published 2026-10-15.
- How severe is CVE-2026-101310?
- High severity. CVSS v3 base score is 7.0 out of 10.