CVE-2019-5611

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-08-30 · updated 2026-06-17
Weakness: CWE-20

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.

Affected products

FreeBSD: 11.2, 11.2-p10, 11.2-p11, 11.2-p12, 11.2-p13, 11.2-p2 (+17)
Clustered Data ONTAP: all versions

References

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

Get alerted when CVE-2019-5611 or the next vulnerability affects your stack