CVE-2019-5596
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…
Does this matter?
2 public exploits are published in Exploit-DB (verified) and the impact is high, while EPSS rates exploitation at 1.2%. Anyone can run this; patch or mitigate before the next change window and check exposed instances for signs of use.
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.
- CVSS 3.0
- 8.8 HIGHCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 1.23% probability · 69th percentile
- Public exploits
- 2 in Exploit-DB · verified · first 10 July 2019
- CISA KEV
- Not listed
- Affected
- freebsd/freebsd
- Source
- secteam@freebsd.org
EPSS 1.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (2)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/155790/FreeBSD-fd-Privilege-Escalation.html
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:02.fd.ascPatch, Third Party Advisory
- http://packetstormsecurity.com/files/155790/FreeBSD-fd-Privilege-Escalation.html
- https://security.FreeBSD.org/advisories/FreeBSD-SA-19:02.fd.ascPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.