CVE-2026-101309

highpriority · track · 0EPSS 0.001 · 2 %ileDENL
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.12% (2nd) EPSS
CVSS 7 · high
Is it mine?
5 products
Check your exposure
Who says so?
2 sources
cert_bund · ncsc_nl

EPSS · scored 2026-10-27

The xHCI (USB 3) device model did not validate or save the event ring size provided by the guest. The size was re-read from guest memory on each use, and Transfer Request Block (TRB) fields were loaded without protection against concurrent modification by the guest. This race condition could be triggered by a guest running malicious, privileged code. 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.

01

cvss

Technical severity, 0–10. One row per scoring source.

7.0
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.4–7

v3.17highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 1 · impact 5.9
v3.16.4mediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.17highCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · NCSC-NL NL
02

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-362USCWE-362US
04

affected products (5)

Products and version ranges known to be affected.

05

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.

06

sources

Which sources assert this record, and when.

cert_bundncsc_nlNVDCVE.orgMITRE
published 2026-10-15modified 2026-10-16
07

references (1) nvd

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan