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Integer overflow causes an infinite loop in packet buffer growth in PgBouncer

CVE-2026-6668 affects azl3 pgbouncer 1.25.2-1 on Azure Linux 3.0. CVSS base score 7.5 (Microsoft Security Response Center). EPSS 0.00404 (percentile 0.32287), scored 2026-10-03. Fixed version: 1.26.0-1.

Published 2026-10-05 08:15:50.078493+00:00

CVE

CVE-2026-6668

Product

azl3 pgbouncer 1.25.2-1 on Azure Linux 3.0

CCR priority

30.1 /100 (P4)

CVSS

7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Microsoft Security Response Center

EPSS

0.00404 · percentile 0.32282 · 2026-10-04

KEV

no

Affected products

• azl3 pgbouncer 1.25.2-1 on Azure Linux 3.0
• pgbouncer · Fixed version: 1.26.0-1

Provenance

• Microsoft MSRC Security Update Guide (CVRF) · Source record · observed 2026-10-04 07:08:49.022374+00:00 UTC
• OSV.dev · Source record · observed 2026-10-04 23:49:35.786600+00:00 UTC
• FIRST EPSS daily exploit-probability · Source record · observed 2026-10-05 08:16:32.814186+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-6668.html