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 potentially allowing a malicious local user to gain root privileges or escape from a jail.

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CVSS v3.1

8.8 HIGH

EPSS

1.23%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

EPSS Trend

Aug 16, 2026 → Sep 7, 2026

● 0.00pp

1.23% → 1.23% over 7 tracked changes

CVSS v3.1 Detail

Attack VectorLOCAL

Attack ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

ScopeCHANGED

ConfidentialityHIGH

IntegrityHIGH

AvailabilityHIGH

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Connections

1 relationships

freebsd

source

Timeline

disclosure → media coverage

Feb 12, 2019

Disclosure — published as a CVE record. · last revised by NVD Nov 21, 2024

Public PoC (1)

github.com/raymontag/CVE-2019-5596

Unverified third-party code — review before executing.