Use after free in FreeBSD
Priority MEDIUM 46CWE-416Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p7, 10.4-STABLE, 10.4-RELEASE-p7, and 10.3-RELEASE-p28, the kernel does not properly validate IPsec packets coming from a trusted host. Additionally, a use-after-free vulnerability exists in the IPsec AH handling code. This issue could cause a system crash or other unpredictable results.
Why it matters now
EPSS 0.02086 81st 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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| FreeBSD | FreeBSD | All supported versions of FreeBSD | — | No fix listed | CNA |
- FreeBSD VendorFreeBSD Affected All supported versions of FreeBSD Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* | 11.0 to before 11.1 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:10.3:p28:*:*:*:*:*:* | 10.3 p28 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:10.4:*:*:*:*:*:*:* | 10.4 | Vulnerable | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:10.4:p7:*:*:*:*:*:* | 10.4 p7 | Vulnerable | FreeBSD |
- cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:* Versions 11.0 to before 11.1 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:10.3:p28:*:*:*:*:*:* Versions 10.3 p28 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:10.4:*:*:*:*:*:*:* Versions 10.4 Vulnerable ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:10.4:p7:*:*:*:*:*:* Versions 10.4 p7 Vulnerable ·FreeBSD
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-6916
- 2026-10-03 Alias added: GHSA-mvc8-6h45-px2q
References
Patch 1
More Freebsd vulnerabilities
- 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
Sources
- CVE-2018-6916 · CVE Program
- CVE-2018-6916 · NVD
- FIRST EPSS
- GHSA-mvc8-6h45-px2q · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences