HOMEVULNERABILITIESCVE-2019-5611
HIGH

CVE-2019-5611

CWE-20Published: August 30, 2019· Updated: Jun 17, 2026

7.5
CVSS v3.1

Official Description

In FreeBSD 12.0-STABLE before r350828, 12.0-RELEASE before 12.0-RELEASE-p10, 11.3-STABLE before r350829, 11.3-RELEASE before 11.3-RELEASE-p3, and 11.2-RELEASE before 11.2-RELEASE-p14, a missing check in the function to arrange data in a chain of mbufs could cause data returned not to be contiguous. Extra checks in the IPv6 stack could catch the error condition and trigger a kernel panic, leading to a remote denial of service.

NVD Source

Technical Analysis

CVE-2019-5611 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

freebsd1 product(s)
freebsd
netapp1 product(s)
clustered data ontap
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://packetstormsecurity.com/files/154170/FreeBSD-Security-Advisory-FreeBSD-SA-19-22.mbuf.html
PATCHhttps://seclists.org/bugtraq/2019/Aug/33
PATCHhttps://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.asc
PATCHhttps://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.asc
PATCHhttps://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.asc
PATCHhttps://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.asc
PATCHhttp://packetstormsecurity.com/files/154170/FreeBSD-Security-Advisory-FreeBSD-SA-19-22.mbuf.html
PATCHhttps://seclists.org/bugtraq/2019/Aug/33
PATCHhttps://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.asc
PATCHhttps://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.asc
PATCHhttps://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.asc
PATCHhttps://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.asc
ADVISORYhttps://security.netapp.com/advisory/ntap-20190910-0002/
ADVISORYhttps://security.netapp.com/advisory/ntap-20190910-0002/

All References (14)

→
http://packetstormsecurity.com/files/154170/FreeBSD-Security-Advisory-FreeBSD-SA-19-22.mbuf.htmlExploit · Patch · Third Party Advisory · VDB Entry
→
https://seclists.org/bugtraq/2019/Aug/33Exploit · Mailing List · Patch · Third Party Advisory
→
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.ascPatch · Vendor Advisory
→
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.ascPatch · Vendor Advisory
→
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.ascPatch · Vendor Advisory
→
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.ascPatch · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20190910-0002/Third Party Advisory
→
http://packetstormsecurity.com/files/154170/FreeBSD-Security-Advisory-FreeBSD-SA-19-22.mbuf.htmlExploit · Patch · Third Party Advisory · VDB Entry
→
https://seclists.org/bugtraq/2019/Aug/33Exploit · Mailing List · Patch · Third Party Advisory
→
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.ascPatch · Vendor Advisory
→
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.ascPatch · Vendor Advisory
→
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.ascPatch · Vendor Advisory
→
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:22.mbuf.ascPatch · Vendor Advisory
→
https://security.netapp.com/advisory/ntap-20190910-0002/Third Party Advisory

Quick Facts

CVE IDCVE-2019-5611
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-20
CISA KEVNo
Affected2 vendor(s)
PublishedAug 30, 2019

Related CVEs (CWE-20)

CVE-2008-4559
10.0
CVE-2008-6556
10.0
CVE-2009-0258
10.0
CVE-2008-5810
10.0
CVE-2008-4770
10.0
CVE-2008-6557
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2019-5611 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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