Bug 2527292

Summary: CVE-2026-18024 postgresql18: PostgreSQL: Information disclosure via buffer over-read in ascii() function [fedora-all]
Product: [Fedora] Fedora Reporter: Srikanth Balasubramanian <sbalasub>
Component: postgresql18Assignee: Filip Januš <fjanus>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: db-sig, fjanus, ndavidov
Target Milestone: ---Keywords: Security, SecurityTracking
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["89aa64aa-96f3-42a6-affb-97f179e58391"]}
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:    
Bug Blocks: 2515323    

Description Srikanth Balasubramanian 2026-09-02 09:16:39 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.

Buffer over-read in PostgreSQL ascii() SQL function allows a user to disclose up to 3 bytes after the end of a specific allocation, via a crafted text value.  This is the same class of defect that CVE-2026-2006 fixed, though this instance has less impact.  Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.