Description
Integer wraparound in multiple PostgreSQL server features allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds. This may execute arbitrary code as the operating system user running the database. In applications that pass gigabyte-scale user inputs to the relevant database functions, the application input provider may achieve a segmentation fault. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
Affected products
postgresql: postgresql
References10
- www.postgresql.org/support/security/CVE-2026-6473/ PatchVendor Advisory
- access.redhat.com/errata/RHSA-2026:22878
- access.redhat.com/errata/RHSA-2026:26181
- access.redhat.com/errata/RHSA-2026:26203
- access.redhat.com/errata/RHSA-2026:26204
- access.redhat.com/errata/RHSA-2026:26524
- access.redhat.com/errata/RHSA-2026:26525
- access.redhat.com/errata/RHSA-2026:26561
- access.redhat.com/errata/RHSA-2026:27718
- access.redhat.com/errata/RHSA-2026:27738
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 1% percentile: 64 · as of 14 November 2026
- CWE
- CWE-190
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