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CVE-2016-6243

16
FAUCET Score

CVE-2016-6243 describes a denial-of-service vulnerability in OpenBSD versions 5.8 and 5.9, where a local user can trigger a kernel panic by providing a crafted value to the __thrsleep system call. This vulnerability has a CVSSv3 score of 5.5 (Medium), indicating a low attack complexity and requiring local access, with the primary impact being high availability loss. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
5.8CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:5.8:*:*:*:*:*:*:*
5.9CPE matchmatch criteria
cpe:2.3:o:openbsd:openbsd:5.9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.43%
Probability of exploitation in next 30 days
EPSS Percentile
35.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0043 is in the 90th percentile among its peer group of 15,938 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

openbsd.org / errata58.html
Release Notes
openbsd.org / errata59.html
Release Notes
openwall.com / lists/oss-security/2016/07/14/5
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2016/07/17/7
ExploitMailing ListThird Party Advisory
securityfocus.com / bid/91805