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TI-2026-02622 Aliases CVE-2026-3038GHSA-jjxv-p5qr-w2hv

Local DoS and possible privilege escalation via routing sockets

Priority MEDIUM 40CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · 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

The rtsock_msg_buffer() function serializes routing information into a buffer. As a part of this, it copies sockaddr structures into a sockaddr_storage structure on the stack. It assumes that the source sockaddr length field had already been validated, but this is not necessarily the case, and it's possible for a malicious userspace program to craft a request which triggers a 127-byte overflow. In practice, this overflow immediately overwrites the canary for the rtsock_msg_buffer() stack frame, resulting in a panic once the function returns. The bug allows an unprivileged user to crash the kernel by triggering a stack buffer overflow in rtsock_msg_buffer(). In particular, the overflow will corrupt a stack canary value that is verified when the function returns; this mitigates the impact of the stack overflow by triggering a kernel panic. Other kernel bugs may exist which allow userspace to find the canary value and thus defeat the mitigation, at which point local privilege escalation may be possible.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0065 51st percentileScored 2026-11-07
Fix Fixed FreeBSD (FreeBSD): p4, p9, p10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

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 p4; 14.3-RELEASE to before p9; 13.5-RELEASE to before p10; 14.4-RC1p4, p9, p10Patch availableCNA
  • FreeBSD VendorFreeBSD Affected 15.0-RELEASE to before p4; 14.3-RELEASE to before p9; 13.5-RELEASE to before p10; 14.4-RC1 Fixed in p4, p9, p10 Patch available CNA

CPE configurations NVD · 24

CPEVersionsRoleVendor
cpe:2.3:o:freebsd:freebsd:13.5:-:*:*:*:*:*:*13.5VulnerableFreeBSD
cpe:2.3:o:freebsd:freebsd:13.5:p1:*:*:*:*:*:*13.5 p1VulnerableFreeBSD
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: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:13.5:-:*:*:*:*:*:* Versions 13.5 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: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
  • 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
Show 14 more CPE
CPEVersionsRoleVendor
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: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:14.4: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: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: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:14.4: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

Remediation

  • Fix · CNA FreeBSD (FreeBSD) Fixed in p4, p9, p10

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-3038
  2. 2026-10-03 Alias added: GHSA-jjxv-p5qr-w2hv
  3. 2026-10-25 Priority changed: LOW → MEDIUM
  4. 2026-11-04 EPSS moved to the 50th–90th percentile

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