CVE-2026-50738

Name	CVE-2026-50738
Description	A use-after-free condition exists in pglogical's worker signaling code, where a worker structure can be dereferenced after the underlying slot has been freed or recycled during normal worker lifecycle events. The condition is reachable during normal replication operation, including by a low-privileged user able to influence worker start, stop, and restart timing through permitted pglogical operations. In the typical case the condition crashes replication workers, causing an availability impact. In the worst case a use-after-free in a PostgreSQL backend can be leveraged as a remote code execution primitive at the privilege of that backend.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
pglogical (PTS)	bullseye	2.3.3-3+deb11u1	vulnerable
	bookworm	2.4.2-3	vulnerable
	trixie	2.4.5-1	vulnerable
	forky	2.4.7-1	vulnerable
	sid	2.4.8-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
pglogical	source	(unstable)	2.4.8-1

Notes

https://github.com/2ndQuadrant/pglogical/releases/tag/REL2_4_8
https://www.enterprisedb.com/docs/security/advisories/cve202650735/
Fixed by: https://github.com/2ndQuadrant/pglogical/commit/ed330e94cbceb51681eee7516708e142458eb005 (REL2_4_8)