VDB
RHSA-2026:83843
RHSA-2026:83843
PUBLISHED
CVSS 8.800000190734863 HIGH
A flaw was found in PgBouncer. An integer overflow in the message buffer growth logic allows a remote attacker to cause a Denial of Service (DoS) when a large maximum packet size is configured. By sending a specially crafted packet header declaring an excessively large length, an attacker can trigger an infinite loop in the buffer calculation. Because PgBouncer handles connections in a single process, this loop consumes a full CPU core and halts all pooled connections until the process is restarted.
Risk Scores
CVSS 3.1
8.800000190734863
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | pgbouncer-0:1.26.1-1.hum1@s390x as a component of Red Hat Hardened Images | 1.26.1-1.hum1 |
| Red Hat | pgbouncer-0:1.26.1-1.hum1@x86_64 as a component of Red Hat Hardened Images | 1.26.1-1.hum1 |
| Red Hat | pgbouncer-0:1.26.1-1.hum1@src as a component of Red Hat Hardened Images | 1.26.1-1.hum1 |
| Red Hat | pgbouncer-0:1.26.1-1.hum1@aarch64 as a component of Red Hat Hardened Images | 1.26.1-1.hum1 |
Timeline
- Oct 16, 2026 CVE Published
- Oct 17, 2026 CVE Updated
- Oct 17, 2026 Distribution Patch
- Oct 17, 2026 Distribution Patch
- Oct 17, 2026 Security Advisory
- Oct 17, 2026 Security Advisory
- Oct 17, 2026 Security Advisory
- Oct 17, 2026 Security Advisory
References
- https://access.redhat.com/errata/RHSA-2026:83843 advisory
- https://images.redhat.com/ advisory
- https://access.redhat.com/security/cve/CVE-2026-107348 advisory
- https://access.redhat.com/security/updates/classification/ advisory
- https://access.redhat.com/security/cve/CVE-2026-107349 advisory
- https://access.redhat.com/security/cve/CVE-2026-107350 advisory
- https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_83843.json advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2552741 issue
- https://www.cve.org/CVERecord?id=CVE-2026-107348 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-107348 advisory
- https://www.pgbouncer.org/changelog.html advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2552735 issue
- https://www.cve.org/CVERecord?id=CVE-2026-107349 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-107349 advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2552733 issue
- https://www.cve.org/CVERecord?id=CVE-2026-107350 advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-107350 advisory