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TI-2026-30794 Aliases CVE-2026-42511GHSA-xg3v-hpwh-q32x

Remote code execution via malicious DHCP options

Priority LOW 38CWE-149Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives. When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it. A rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00431 37th percentileScored 2026-11-07
Fix Fixed FreeBSD (FreeBSD): p7, p3, p12 +1

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

VendorProductAffected versionsFixed inStatusSource
FreeBSDFreeBSD15.0-RELEASE to before p7; 14.4-RELEASE to before p3; 14.3-RELEASE to before p12; 13.5-RELEASE to before p13p7, p3, p12, p13Patch availableCNA
  • FreeBSD VendorFreeBSD Affected 15.0-RELEASE to before p7; 14.4-RELEASE to before p3; 14.3-RELEASE to before p12; 13.5-RELEASE to before p13 Fixed in p7, p3, p12, p13 Patch available CNA

CPE configurations NVD · 37

CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:13.5:-:*:*:*:*:*:*13.5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:beta3:*:*:*:*:*:*13.5 beta3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p1:*:*:*:*:*:*13.5 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p10:*:*:*:*:*:*13.5 p10VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p11:*:*:*:*:*:*13.5 p11VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p12:*:*:*:*:*:*13.5 p12VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p2:*:*:*:*:*:*13.5 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p3:*:*:*:*:*:*13.5 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p4:*:*:*:*:*:*13.5 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p5:*:*:*:*:*:*13.5 p5VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:-:*:*:*:*:*:* Versions 13.5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:beta3:*:*:*:*:*:* Versions 13.5 beta3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p1:*:*:*:*:*:* Versions 13.5 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p10:*:*:*:*:*:* Versions 13.5 p10 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p11:*:*:*:*:*:* Versions 13.5 p11 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p12:*:*:*:*:*:* Versions 13.5 p12 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p2:*:*:*:*:*:* Versions 13.5 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p3:*:*:*:*:*:* Versions 13.5 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p4:*:*:*:*:*:* Versions 13.5 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p5:*:*:*:*:*:* Versions 13.5 p5 Vulnerable ·FreeBSD
Show 27 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:13.5:p6:*:*:*:*:*:*13.5 p6VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p7:*:*:*:*:*:*13.5 p7VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p8:*:*:*:*:*:*13.5 p8VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p9:*:*:*:*:*:*13.5 p9VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:*14.3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:*14.3 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:*14.3 p10VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:*14.3 p11VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:*14.3 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:*14.3 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:*14.3 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:*14.3 p5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:*14.3 p6VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:*14.3 p7VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:*14.3 p8VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:*14.3 p9VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:*14.4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:*14.4 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:*14.4 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:14.4:rc1:*:*:*:*:*:*14.4 rc1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:*15.0VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:*15.0 p1VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:*15.0 p2VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:*15.0 p3VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:*15.0 p4VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:*15.0 p5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:*15.0 p6VulnerableFreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p6:*:*:*:*:*:* Versions 13.5 p6 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p7:*:*:*:*:*:* Versions 13.5 p7 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p8:*:*:*:*:*:* Versions 13.5 p8 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:13.5:p9:*:*:*:*:*:* Versions 13.5 p9 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:* Versions 14.3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:* Versions 14.3 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:* Versions 14.3 p10 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:* Versions 14.3 p11 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:* Versions 14.3 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:* Versions 14.3 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:* Versions 14.3 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:* Versions 14.3 p5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:* Versions 14.3 p6 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:* Versions 14.3 p7 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:* Versions 14.3 p8 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:* Versions 14.3 p9 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:* Versions 14.4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:* Versions 14.4 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:* Versions 14.4 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:14.4:rc1:*:*:*:*:*:* Versions 14.4 rc1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:* Versions 15.0 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:* Versions 15.0 p1 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:* Versions 15.0 p2 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:* Versions 15.0 p3 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:* Versions 15.0 p4 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:* Versions 15.0 p5 Vulnerable ·FreeBSD
  • cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:* Versions 15.0 p6 Vulnerable ·FreeBSD

Remediation

  • Fix · CNA FreeBSD (FreeBSD) Fixed in p7, p3, p12, p13

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    FreeBSD p12, p13 and 2 more versions

    6 records Highest priority Priority MEDIUM 1 MEDIUM, 5 LOW

    Other records, highest priority first

    • TI-2026-30795 Remotely triggerable out-of-bounds heap write in dhclientPriority MEDIUM 40
    • TI-2026-06287 pf can overflow the stack parsing crafted SCTP packetsPriority LOW 39
    • TI-2026-27657 Heap overflow in libnvPriority LOW 37
    Show all 6 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-42511
  2. 2026-10-03 Alias added: GHSA-xg3v-hpwh-q32x

References

Advisory 1

  • 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