Bug 2499705

Summary:	CVE-2026-6479 postgresql16: PostgreSQL: Denial of Service via uncontrolled recursion in SSL/GSS negotiation [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Jon Weiser <jweiser>
Component:	postgresql16	Assignee:	Filip Januš <fjanus>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	rawhide	CC:	db-sig, fjanus, ndavidov
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["d318f1c3-1da2-427b-81fd-088d3eb3d419"]}
Fixed In Version:	postgresql16-16.14-1.fc45	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-07-23 22:11:31 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2477445

Description Jon Weiser 2026-07-13 15:26:49 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service.  If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket.  Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

Comment 1 Fedora Update System 2026-07-23 12:21:35 UTC

FEDORA-2026-f8ee1fd482 (postgresql16-16.14-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-f8ee1fd482

Comment 2 Fedora Update System 2026-07-23 14:39:08 UTC

FEDORA-2026-5b2e6bf881 (postgresql16-16.14-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-5b2e6bf881

Comment 3 Fedora Update System 2026-07-23 22:11:31 UTC

FEDORA-2026-5b2e6bf881 (postgresql16-16.14-1.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 4 Fedora Update System 2026-07-24 01:29:14 UTC

FEDORA-2026-f8ee1fd482 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-f8ee1fd482`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-f8ee1fd482

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-08-01 00:53:46 UTC

FEDORA-2026-f8ee1fd482 (postgresql16-16.14-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.