CVE-2019-5596

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-02-12 · updated 2026-06-17

Description

In FreeBSD 11.2-STABLE after r338618 and before r343786, 12.0-STABLE before r343781, and 12.0-RELEASE before 12.0-RELEASE-p3, a bug in the reference count implementation for UNIX domain sockets can cause a file structure to be incorrectly released potentially allowing a malicious local user to gain root privileges or escape from a jail.

Affected products

FreeBSD: 11.2, 12.0

References

http://packetstormsecurity.com/files/155790/FreeBSD-fd-Privilege-Escalation.html
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:02.fd.asc
http://packetstormsecurity.com/files/155790/FreeBSD-fd-Privilege-Escalation.html
https://security.FreeBSD.org/advisories/FreeBSD-SA-19:02.fd.asc

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