CVE-2025-71116 libceph: make decode_pool() more resilient against corrupted osdmaps
A maliciously corrupted OSD map can cause out-of-bounds reads in the Linux kernel's Ceph client, potentially leading to crashes or information leaks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-71116?
CVE-2025-71116 is a critical memory corruption vulnerability in Linux kernel, published on 14 Jan 2026. 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: make decode_pool() more resilient against corrupted osdmaps
If the osdmap is (maliciously) corrupted such that the encoded length of ceph_pg_pool envelope is less than what is expected for a particular encoding version, out-of-bounds reads may ensue because the only bounds check that is there is based on that length value.
This patch adds explicit bounds checks for each field that is decoded or skipped.
Weakness: CWE-125
Which versions are affected by CVE-2025-71116?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-71116?
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-2025-71116 being exploited?
There is no known exploitation of CVE-2025-71116 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-74550, BELL-CVE-2025-71116, DEBIAN-CVE-2025-71116, GHSA-6mqv-85g4-8qvj, ROOT-OS-DEBIAN-11-CVE-2025-71116, ROOT-OS-DEBIAN-12-CVE-2025-71116 and 4 more.