Integer Overflow or Wraparound Affecting libpq package, versions [13.6,17.7)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published17 Nov 2025
- disclosed13 Nov 2025
- creditUnknown
Introduced: 13 Nov 2025
CVE-2025-12818 (opens in a new tab)How to fix?
Upgrade libpq to version 17.7 or higher.
Overview
Affected versions of this package are vulnerable to Integer Overflow or Wraparound via the libpq client library functions. An attacker can cause the client application to crash or experience a segmentation fault by sending specially crafted PostgreSQL protocol data that triggers integer wraparound and leads to an out-of-bounds write during connection establishment.