CVE-2023-52389 Integer overflow in n/a

Critical 9.8 Published 27 Jan 2024 Updated 29 May 2025

An integer overflow in POCO's UTF32Encoding can lead to a stack buffer overflow, potentially allowing code execution or denial of service.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2023-52389?

CVE-2023-52389 is a critical vulnerability in n/a, published on 27 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

UTF32Encoding.cpp in POCO has a Poco::UTF32Encoding integer overflow and resultant stack buffer overflow because Poco::UTF32Encoding::convert() and Poco::UTF32::queryConvert() may return a negative integer if a UTF-32 byte sequence evaluates to a value of 0x80000000 or higher. This is fixed in 1.11.8p2, 1.12.5p2, and 1.13.0.

Weakness: CWE-190

Which versions are affected by CVE-2023-52389?

It affects 1 product.

Products include Pocoproject Poco.

How do I fix CVE-2023-52389?

Upgrade to a fixed version.

Is CVE-2023-52389 being exploited?

There is no known exploitation of CVE-2023-52389 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2023-52389, DLA-4024-1, GHSA-3g75-6vfp-4hm3, OESA-2026-3963, OESA-2026-3964, OESA-2026-3965 and 1 more.