CVE-2025-68284 libceph: prevent potential out-of-bounds writes in handle_auth_session_key()
An attacker can trigger out-of-bounds writes in the Linux kernel's Ceph client via crafted network packets, potentially leading to code execution or system crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-68284?
CVE-2025-68284 is a critical memory corruption vulnerability in Linux, published on 16 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
libceph: prevent potential out-of-bounds writes in handle_auth_session_key()
The len field originates from untrusted network packets. Boundary checks have been added to prevent potential out-of-bounds writes when decrypting the connection secret or processing service tickets.
[ idryomov: changelog ]
Which versions are affected by CVE-2025-68284?
How do I fix CVE-2025-68284?
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-2025-68284 being exploited?
There is no known exploitation of CVE-2025-68284 in the wild and no public exploit code.
Sources
Also known as AZL-72637, BELL-CVE-2025-68284, DEBIAN-CVE-2025-68284, GHSA-vccx-ghmw-f5j8, ROOT-OS-DEBIAN-12-CVE-2025-68284, ROOT-OS-DEBIAN-13-CVE-2025-68284 and 3 more.