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CVE-2019-5611

26
FAUCET Score

CVE-2019-5611 is a remote denial-of-service vulnerability affecting FreeBSD versions 12.0-STABLE, 12.0-RELEASE, 11.3-STABLE, 11.3-RELEASE, and 11.2-RELEASE, as well as NetApp products utilizing these FreeBSD versions. The flaw stems from a missing data contiguity check within the mbuf chain arrangement function, which can be triggered by extra checks in the IPv6 stack. This vulnerability carries a CVSS score of 7.5 (High), indicating it can be exploited remotely with low attack complexity, leading to a complete denial of service through a kernel panic. There is currently no evidence of active exploitation, no public exploit code available (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
11.2CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:11.2:-:*:*:*:*:*:*
11.2CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:11.2:p10:*:*:*:*:*:*
11.2CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:11.2:p11:*:*:*:*:*:*
11.2CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:11.2:p12:*:*:*:*:*:*
11.2CPE matchmatch criteria
cpe:2.3:o:freebsd:freebsd:11.2:p13:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.42%
Probability of exploitation in next 30 days
EPSS Percentile
90.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0442 is in the 83rd percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

packetstormsecurity.com / files/154170/FreeBSD-Security-Advisory-FreeBSD-SA-19-22.mbuf.html
ExploitPatchThird Party AdvisoryVDB Entry
seclists.org / bugtraq/2019/Aug/33
ExploitMailing ListPatchThird Party Advisory
security.freebsd.org / advisories/FreeBSD-SA-19:22.mbuf.asc
PatchVendor Advisory
security.netapp.com / advisory/ntap-20190910-0002
Third Party Advisory