CVE-2023-29469 Use after free in n/a

What is CVE-2023-29469?

CVE-2023-29469 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 24 Apr 2023. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value).

Weakness: CWE-415

Which versions are affected by CVE-2023-29469?

It affects 2 products.

Products include Debian Debian Linux, Xmlsoft Libxml2.

How do I fix CVE-2023-29469?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-29469 being exploited?

There is no known exploitation of CVE-2023-29469 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2023-29469, AZL-26282, DEBIAN-CVE-2023-29469, ECHO-cb85-d498-d0e4, GHSA-7jv7-hr35-fwjr, JLSEC-2025-80 and 1 more.