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CVE-2026-6473 is a memory corruption vulnerability in PostgreSQL caused by integer wraparound in multiple server-side memory-allocation calculations. In affected code paths, attacker-influenced size computations can overflow, causing PostgreSQL to allocate a buffer smaller than intended and then write past the end of that buffer. The issue affects multiple PostgreSQL server features and related parsing paths, including cases tied to allocation macros and additional overflow conditions in components such as contrib/intarray, contrib/ltree, and ts_headline input handling. Successful exploitation can crash the server and may permit arbitrary code execution as the operating system account running the PostgreSQL process. Many, but not all, affected cases are limited to 32-bit builds. Affected versions are PostgreSQL releases before 18.4, 17.10, 16.14, 15.18, and 14.23.
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No public exploit code observed for this vulnerability.
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38 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability in PostgreSQL addressed indirectly through upgraded third-party components in Tenable Security Center.
A PostgreSQL memory safety flaw involving integer wraparound, undersized allocations, and out-of-bounds writes that can cause segmentation faults and potentially remote code execution or memory corruption.
A PostgreSQL memory corruption vulnerability involving integer overflows in memory-allocation calculations that can cause buffer overflows, server crashes, and possible arbitrary code execution.
A PostgreSQL memory corruption vulnerability involving integer overflows in memory-allocation calculations that can cause server crashes and may enable arbitrary code execution, especially in many 32-bit build cases.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.