Memory disclosure via mismatched statistics arrays
Published May 14, 2026 · Updated May 14, 2026
Buffer over-read in PostgreSQL 18 before 18.4 allows remote authenticated users to infer adjacent server memory during query planning. The pg_restore_attribute_stats() function accepts arrays of unequal length, and the planner indexes past the end of the shorter statistics array. The user must have table-maintainer privileges; the resulting impact is limited to disclosure of memory values adjacent to that array.
Summary
What happened
Buffer over-read in PostgreSQL 18 before 18.4 allows remote authenticated users to infer adjacent server memory during query planning. The pg_restore_attribute_stats() function accepts arrays of unequal length, and the planner indexes past the end of the shorter statistics array. The user must have table-maintainer privileges; the resulting impact is limited to disclosure of memory values adjacent to that array.
The record
- CVE
- CVE-2026-6575
- Published
- May 14, 2026
- Updated
- May 14, 2026
- Vendor
- PostgreSQL Global Development Group
- Product
- PostgreSQL
- Classifications
- CWE-126
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 14, 2026CVE publishedPublication date reported by the CVE source.
- May 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=18 <18.4
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Technologies
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Your stack
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