Bug 2495162

Summary:	CVE-2026-13455 postgresql16-anonymizer: PostgreSQL Anonymizer: Information Disclosure via brute-force attack on hash function [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Jon Weiser <jweiser>
Component:	postgresql16-anonymizer	Assignee:	Petr Khartskhaev <pkhartsk>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	45	CC:	db-sig, pkhartsk
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["2798524c-783d-49c3-abc1-b83dca9b7ab5"]}
Fixed In Version:	postgresql16-anonymizer-3.1.3-1.fc44	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-08-28 16:06:36 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:	2495009

Description Jon Weiser 2026-06-30 20:10:55 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.

PostgreSQL Anonymizer contains a vulnerability that allows unprivileged masked users to repeatedly call the anon.hash() function and collects (seed, hash_output) pairs to perform an offline brute-force attack and deduce the salt. The problem is resolved in PostgreSQL Anonymizer 3.1.2 and later versions

Comment 1 Aoife Moloney 2026-08-17 15:08:20 UTC

This bug appears to have been reported against 'rawhide' during the Fedora Linux 45 development cycle.
Changing version to 45.

Comment 2 Fedora Update System 2026-08-19 13:43:06 UTC

FEDORA-2026-1b05b6dad1 (postgresql16-anonymizer-3.1.3-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-1b05b6dad1

Comment 3 Fedora Update System 2026-08-20 16:39:48 UTC

FEDORA-2026-1b05b6dad1 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-2026-1b05b6dad1`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-1b05b6dad1

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

Comment 4 Fedora Update System 2026-08-28 16:06:36 UTC

FEDORA-2026-1b05b6dad1 (postgresql16-anonymizer-3.1.3-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.