Information disclosure in FreeBSD
Priority LOW 25CWE-200Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
In FreeBSD before 11.2-STABLE(r338983), 11.2-RELEASE-p4, 11.1-RELEASE-p15, 10.4-STABLE(r338984), and 10.4-RELEASE-p13, due to insufficient initialization of memory copied to userland in the getcontext and swapcontext system calls, small amounts of kernel memory may be disclosed to userland processes. Unprivileged authenticated local users may be able to access small amounts privileged kernel data.
Why it matters now
EPSS 0.00372 31st 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-2018-17155
- 2026-10-03 Alias added: GHSA-jghc-cwfr-7hf7
References
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-2018-17155 · CVE Program
- CVE-2018-17155 · NVD
- FIRST EPSS
- GHSA-jghc-cwfr-7hf7 · 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