CVE-2026-52962 ceph: fix a buffer leak in __ceph_setxattr()
A buffer leak in the Linux kernel's Ceph filesystem implementation can lead to memory exhaustion and denial of service.
- 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-2026-52962?
CVE-2026-52962 is a high-severity memory corruption vulnerability in Linux kernel, published on 24 Jun 2026. 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:
ceph: fix a buffer leak in __ceph_setxattr()
The old_blob in __ceph_setxattr() can store ci->i_xattrs.prealloc_blob value during the retry. However, it is never called the ceph_buffer_put() for the old_blob object. This patch fixes the issue of the buffer leak.
Weakness: CWE-787
Which versions are affected by CVE-2026-52962?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-52962?
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-2026-52962 being exploited?
There is no known exploitation of CVE-2026-52962 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-90804, BELL-CVE-2026-52962, DEBIAN-CVE-2026-52962, GHSA-2p2x-px9w-6j23, ROOT-OS-DEBIAN-11-CVE-2026-52962, ROOT-OS-DEBIAN-12-CVE-2026-52962 and 3 more.