TI-2018-05060 Aliases CVE-2018-6925 GHSA-jj47-9g63-xxj6

NULL pointer dereference in FreeBSD

LOW 25CWE-476Published 2018-09-28 · Updated 2024-09-17

Key facts

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

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

In FreeBSD before 11.2-STABLE(r338986), 11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-STABLE(r338985), and 10.4-RELEASE-p13, due to improper maintenance of IPv6 protocol control block flags through various failure paths, an unprivileged authenticated local user may be able to cause a NULL pointer dereference causing the kernel to crash.

Why it matters now

EPSS 0.00321 25th percentileScored 2026-11-07

Fix Fixed FreeBSD (FreeBSD): 11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-RELEASE-p13

SSVC decision points

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
FreeBSD	FreeBSD	11.2 to before 11.2-RELEASE-p4; 11.1 to before 11.1-RELEASE-p15; 10 to before 10.4-RELEASE-p13	11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-RELEASE-p13	Patch available	CNA

FreeBSD VendorFreeBSD Affected 11.2 to before 11.2-RELEASE-p4; 11.1 to before 11.1-RELEASE-p15; 10 to before 10.4-RELEASE-p13 Fixed in 11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-RELEASE-p13 Patch available CNA

CPE configurations NVD · 5

CPE	Versions	Role	Vendor
cpe:2.3:o:freebsd:freebsd::::::::	before 11.2	Vulnerable	FreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:::::::*	10.4	Vulnerable	FreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:p13::::::	10.4 p13	Vulnerable	FreeBSD
cpe:2.3:o:freebsd:freebsd:11.1:p15::::::	11.1 p15	Vulnerable	FreeBSD
cpe:2.3:o:freebsd:freebsd:11.2:p4::::::	11.2 p4	Vulnerable	FreeBSD

cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* Versions before 11.2 Vulnerable ·FreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:*:*:*:*:*:*:* Versions 10.4 Vulnerable ·FreeBSD
cpe:2.3:o:freebsd:freebsd:10.4:p13:*:*:*:*:*:* Versions 10.4 p13 Vulnerable ·FreeBSD
cpe:2.3:o:freebsd:freebsd:11.1:p15:*:*:*:*:*:* Versions 11.1 p15 Vulnerable ·FreeBSD
cpe:2.3:o:freebsd:freebsd:11.2:p4:*:*:*:*:*:* Versions 11.2 p4 Vulnerable ·FreeBSD

Remediation

Fix · CNA FreeBSD (FreeBSD) Fixed in 11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-RELEASE-p13

Timeline

2026-10-02 Threatist record created from CVE-2018-6925
2026-10-03 Alias added: GHSA-jj47-9g63-xxj6

References

Patch 1

https://security.FreeBSD.org/advisories/FreeBSD-EN-18:11.listen.asc

Other 1

https://www.flexera.com/company/secunia-research/advisories/SR-2018-21.html

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