REDHAT-BUG-2515317: Buffer Overflow

Q: What access does an attacker need to exploit this issue?

The attacker must be able to choose the timezone value used by PostgreSQL's to_char(timestamptz) processing. Exploitation uses a long POSIX timezone abbreviation.

Q: What is the impact if exploitation succeeds?

Successful exploitation can allow arbitrary code execution as the operating system user that runs the PostgreSQL database service.

Q: Which PostgreSQL releases need to be updated?

Affected releases are versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24. Update to the applicable listed release or later.

Published Aug 13, 2026

Updated

Heap buffer overflow in PostgreSQL tochar(timestamptz) allows the party choosing the timezone to execute arbitrary code as the operating system user running the database, via a long POSIX timezone abbreviation. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

Affected Software

1 affected component

PostgreSQL postgresql<18.5, <17.11, <16.15, <15.19, <14.24

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade PostgreSQL to a version that resolves this vulnerability.
Fixed in 18.5
Upgrade
Upgrade PostgreSQL to a version that resolves this vulnerability.
Fixed in 17.11
Upgrade
Upgrade PostgreSQL to a version that resolves this vulnerability.
Fixed in 16.15
Upgrade
Upgrade PostgreSQL to a version that resolves this vulnerability.
Fixed in 15.19
Upgrade
Upgrade PostgreSQL to a version that resolves this vulnerability.
Fixed in 14.24

Event History

Aug 13, 2026

Data Sourced

via Red Hat·01:29 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

What access does an attacker need to exploit this issue?

The attacker must be able to choose the timezone value used by PostgreSQL's to_char(timestamptz) processing. Exploitation uses a long POSIX timezone abbreviation.

What is the impact if exploitation succeeds?

Successful exploitation can allow arbitrary code execution as the operating system user that runs the PostgreSQL database service.

Which PostgreSQL releases need to be updated?

Affected releases are versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24. Update to the applicable listed release or later.

REDHAT-BUG-2515317: Buffer Overflow

Affected Software

Remediation

Event History

Frequently Asked Questions

What access does an attacker need to exploit this issue?

What is the impact if exploitation succeeds?

Which PostgreSQL releases need to be updated?

Company

Resources

Contact

Frequently Asked Questions

What access does an attacker need to exploit this issue?

What is the impact if exploitation succeeds?

Which PostgreSQL releases need to be updated?