CVE-2025-38068 crypto: lzo - Fix compression buffer overrun
A buffer overrun in the Linux kernel's LZO compression code allows attackers to cause memory corruption, potentially leading to code execution or system crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-38068?
CVE-2025-38068 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 18 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2025-38068?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-38068?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-38068 being exploited?
There is no known exploitation of CVE-2025-38068 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-64055, BELL-CVE-2025-38068, DEBIAN-CVE-2025-38068, GHSA-qxc4-32hc-g366, ROOT-OS-DEBIAN-11-CVE-2025-38068, ROOT-OS-DEBIAN-12-CVE-2025-38068 and 3 more.