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CVE-2016-6247

19
FAUCET Score

CVE-2016-6247 is a denial-of-service vulnerability affecting OpenBSD versions 5.8 and 5.9. A local attacker can trigger a kernel panic by unmounting a filesystem with an open vnode on the mnt_vnodelist. Rated Medium with a CVSS score of 5.5, this vulnerability requires local access and has a high impact on availability, leading to system instability. There is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage, indicating a low likelihood of widespread exploitation.

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

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