Read the docs
TI-2021-10339 Aliases CVE-2021-29631GHSA-7hc7-vjj6-4p36

Use of uninitialized resource in FreeBSD

Priority LOW 34CWE-908Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

In FreeBSD 13.0-STABLE before n246941-20f96f215562, 12.2-STABLE before r370400, 11.4-STABLE before r370399, 13.0-RELEASE before p4, 12.2-RELEASE before p10, and 11.4-RELEASE before p13, certain VirtIO-based device models in bhyve failed to handle errors when fetching I/O descriptors. A malicious guest may cause the device model to operate on uninitialized I/O vectors leading to memory corruption, crashing of the bhyve process, and possibly arbitrary code execution in the bhyve process.

Why it matters now

EPSS 0.00286 21st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—FreeBSDFreeBSD 13.0-RELEASE before p4, 12.2-RELEASE before p10, 11.4-RELEASE before p13—No fix listedCNA
  • FreeBSD Vendor— Affected FreeBSD 13.0-RELEASE before p4, 12.2-RELEASE before p10, 11.4-RELEASE before p13 Fixed in — No fix listed CNA

CPE configurations NVD · 29

CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:*11.4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p1:*:*:*:*:*:*11.4 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p10:*:*:*:*:*:*11.4 p10VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p11:*:*:*:*:*:*11.4 p11VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p12:*:*:*:*:*:*11.4 p12VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p13:*:*:*:*:*:*11.4 p13VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p2:*:*:*:*:*:*11.4 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p3:*:*:*:*:*:*11.4 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p4:*:*:*:*:*:*11.4 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p5:*:*:*:*:*:*11.4 p5VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:-:*:*:*:*:*:* Versions 11.4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p1:*:*:*:*:*:* Versions 11.4 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p10:*:*:*:*:*:* Versions 11.4 p10 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p11:*:*:*:*:*:* Versions 11.4 p11 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p12:*:*:*:*:*:* Versions 11.4 p12 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p13:*:*:*:*:*:* Versions 11.4 p13 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p2:*:*:*:*:*:* Versions 11.4 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p3:*:*:*:*:*:* Versions 11.4 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p4:*:*:*:*:*:* Versions 11.4 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p5:*:*:*:*:*:* Versions 11.4 p5 Vulnerable ·FreeBSD
Show 19 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:11.4:p6:*:*:*:*:*:*11.4 p6VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p7:*:*:*:*:*:*11.4 p7VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p8:*:*:*:*:*:*11.4 p8VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:11.4:p9:*:*:*:*:*:*11.4 p9VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:-:*:*:*:*:*:*12.2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:p1:*:*:*:*:*:*12.2 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:p10:*:*:*:*:*:*12.2 p10VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:p2:*:*:*:*:*:*12.2 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:p3:*:*:*:*:*:*12.2 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:p4:*:*:*:*:*:*12.2 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:p5:*:*:*:*:*:*12.2 p5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:p6:*:*:*:*:*:*12.2 p6VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:p7:*:*:*:*:*:*12.2 p7VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:p8:*:*:*:*:*:*12.2 p8VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:12.2:p9:*:*:*:*:*:*12.2 p9VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.0:-:*:*:*:*:*:*13.0VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.0:p1:*:*:*:*:*:*13.0 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.0:p2:*:*:*:*:*:*13.0 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.0:p3:*:*:*:*:*:*13.0 p3VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p6:*:*:*:*:*:* Versions 11.4 p6 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p7:*:*:*:*:*:* Versions 11.4 p7 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p8:*:*:*:*:*:* Versions 11.4 p8 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:11.4:p9:*:*:*:*:*:* Versions 11.4 p9 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:-:*:*:*:*:*:* Versions 12.2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:p1:*:*:*:*:*:* Versions 12.2 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:p10:*:*:*:*:*:* Versions 12.2 p10 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:p2:*:*:*:*:*:* Versions 12.2 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:p3:*:*:*:*:*:* Versions 12.2 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:p4:*:*:*:*:*:* Versions 12.2 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:p5:*:*:*:*:*:* Versions 12.2 p5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:p6:*:*:*:*:*:* Versions 12.2 p6 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:p7:*:*:*:*:*:* Versions 12.2 p7 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:p8:*:*:*:*:*:* Versions 12.2 p8 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:12.2:p9:*:*:*:*:*:* Versions 12.2 p9 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.0:-:*:*:*:*:*:* Versions 13.0 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.0:p1:*:*:*:*:*:* Versions 13.0 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.0:p2:*:*:*:*:*:* Versions 13.0 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.0:p3:*:*:*:*:*:* Versions 13.0 p3 Vulnerable ·FreeBSD

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-29631
  2. 2026-10-03 Alias added: GHSA-7hc7-vjj6-4p36

References

Advisory 2

  • 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 576 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences