high7.5
CVE-2026-6668
Integer overflow in the packet buffer growth logic in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to cause a denial of service.
Impact
Integer overflow in the packet buffer growth logic in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to cause a denial of service. Sufficiently large input makes the buffer size computation overflow, leaving the growth loop unable to terminate. Because PgBouncer serves all clients from a single process, this saturates a CPU core and stalls every pooled connection until the process is killed. Both unauthenticated and authenticated code paths can reach the overflow.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| PgBouncer | PgBouncer | through 1.25.2 |
Versions were read from the advisory text. No structured product data has been published for this record yet.