TI-2024-27951 Aliases CVE-2024-41928 GHSA-c77x-v69r-5vpg

bhyve(8) privileged guest escape via TPM device passthrough

LOW 38CWE-125Published 2024-09-05 · Updated 2024-09-20

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

Malicious software running in a guest VM can exploit the buffer overflow to achieve code execution on the host in the bhyve userspace process, which typically runs as root. Note that bhyve runs in a Capsicum sandbox, so malicious code is constrained by the capabilities available to the bhyve process.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00244 15th percentileScored 2026-11-07

Fix Fixed FreeBSD (FreeBSD): p4, p10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
FreeBSD	FreeBSD	14.1-RELEASE to before p4; 14.0-RELEASE to before p10	p4, p10	Patch available	CNA

FreeBSD VendorFreeBSD Affected 14.1-RELEASE to before p4; 14.0-RELEASE to before p10 Fixed in p4, p10 Patch available CNA

CPE names CISA-ADP · 1

CPE	Versions	Role	Vendor
cpe:2.3:o:freebsd:freebsd::::::::	—	—	FreeBSD

cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* Versions — — ·FreeBSD

Remediation

Fix · CNA FreeBSD (FreeBSD) Fixed in p4, p10

Timeline

2026-10-02 Threatist record created from CVE-2024-41928
2026-10-03 Alias added: GHSA-c77x-v69r-5vpg

References

Advisory 1

https://security.freebsd.org/advisories/FreeBSD-SA-24:10.bhyve.asc

TI-2011-04182 Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT… CVSS 2.0HIGH 10.0
TI-2007-03684 Integer overflow in print-bgp.c in the BGP dissector in tcpdump 3.9.6 and earlier allows… CVSS 3.1CRITICAL 9.8
TI-2002-00376 Integer overflow in xdr_array function in RPC servers for operating systems that use… CVSS 3.1CRITICAL 9.8
TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
TI-2003-00437 Off-by-one error in the fb_realpath() function, as derived from the realpath function in… CVSS 3.1CRITICAL 9.8
TI-2003-00642 The prescan function in Sendmail 8.12.9 allows remote attackers to execute arbitrary code… CVSS 2.0HIGH 10.0

See all 611 →

Sources

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