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All errata/p11/ALT-PU-2026-16294-3
ALT-PU-2026-16294-3

Package update pgbouncer in branch p11

Version1.26.0-alt1
Task#434089
Published2026-09-26
Max severityHIGH
Severity:

Closed issues (6)

BDU:2026-15219
HIGH7.5

Уязвимость механизма SCRAM (Salted Challenge Response Authentication Mechanism) программного обеспечения для пула соединения в PostgreSQL PgBouncer, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2026-09-24
CVSS 3.xHIGH 7.5
CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0HIGH 7.8
CVSS:2.0/AV:N/AC:L/Au:N/C:N/I:N/A:C
References
BDU:2026-15220
HIGH7.5

Уязвимость программного обеспечения для пула соединения в PostgreSQL PgBouncer, связанная с выполнением цикла с недоступным условием выхода («Бесконечный цикл»), позволяющая нарушителю вызвать отказ в обслуживании

Published: 2026-09-24
CVSS 3.xHIGH 7.5
CVSS:3.x/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0HIGH 7.8
CVSS:2.0/AV:N/AC:L/Au:N/C:N/I:N/A:C
References
BDU:2026-15222
MEDIUM5.9

Уязвимость механизма SCRAM (Salted Challenge Response Authentication Mechanism) программного обеспечения для пула соединения в PostgreSQL PgBouncer, позволяющая нарушителю вызвать отказ в обслуживании

Published: 2026-09-24
CVSS 3.xMEDIUM 5.9
CVSS:3.x/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0MEDIUM 5.4
CVSS:2.0/AV:N/AC:H/Au:N/C:N/I:N/A:C
References
CVE-2026-19888
HIGH7.5

Missing validation of a mandatory attribute in the SCRAM client-final-message parser in PgBouncer through 1.25.2 allows an unauthenticated remote attacker to crash the process. A malformed message can make the parser report success while leaving a required value unset, which is then dereferenced as a NULL pointer. The crash occurs before any credential is verified, so no valid account is required. Because PgBouncer serves all clients from a single process, this terminates every pooled connection.

Published: 2026-09-23Modified: 2026-09-23
CVSS 3.xHIGH 7.5
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
CVE-2026-6668
HIGH7.5

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.

Published: 2026-09-23Modified: 2026-09-23
CVSS 3.xHIGH 7.5
CVSS:3.x/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
CVE-2026-6669
MEDIUM5.9

Missing upper bound on the key derivation iteration count accepted during SCRAM authentication to a backend server in PgBouncer through 1.25.2 allows a malicious or compromised PostgreSQL backend to cause uncontrolled CPU consumption in PgBouncer. The resulting key derivation cannot be interrupted in frontend builds such as PgBouncer. Because PgBouncer serves all clients from a single process, one backend can in this way stop it from serving traffic for every other database and client it is pooling, so the failure of a single backend is not contained.

Published: 2026-09-23Modified: 2026-09-23
CVSS 3.xMEDIUM 5.9
CVSS:3.x/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
References