Bug 2515304 (CVE-2026-14678)

Summary: CVE-2026-14678 postgresql: PostgreSQL: Information disclosure via buffer over-read in pg_trgm
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dschmidt, jlanda, kshier, rhel-process-autobot, simaishi, stcannon, teagle, watson-tool-maintainers, yguenane
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in PostgreSQL. A buffer over-read vulnerability exists in the pg_trgm index picksplit function, which reads past the end of a heap buffer. This could allow a table maintainer to infer limited memory values by observing index split choices, leading to information disclosure.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2527843, 2527844    
Bug Blocks:    

Description OSIDB Bzimport 2026-08-13 13:27:33 UTC
Buffer over-read in PostgreSQL pg_trgm index picksplit function reads past end of a heap buffer.  This might allow a table maintainer to infer limited memory values, via the lossy signal of index split choices.  Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.