CVE-2026-53016 crypto: ccp - copy IV using skcipher ivsize
A buffer overflow in the Linux kernel CCP driver allows attackers to corrupt memory, potentially leading to code execution or privilege escalation.
- 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-2026-53016?
CVE-2026-53016 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:
crypto: ccp - copy IV using skcipher ivsize
AF_ALG rfc3686-ctr-aes-ccp requests pass an 8-byte IV to the driver.
ccp_aes_complete() restores AES_BLOCK_SIZE bytes into the caller's IV buffer while RFC3686 skciphers expose an 8-byte IV, so the restore overruns the provided buffer.
Use crypto_skcipher_ivsize() to copy only the algorithm's IV length.
Which versions are affected by CVE-2026-53016?
It affects 1 product.
Linux distribution packages (1)
kernel Rocky Linux:10 | All versions | 0:6.12.0-211.34.1.el10_2 |
Products include Linux kernel.
How do I fix CVE-2026-53016?
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-2026-53016 being exploited?
There is no known exploitation of CVE-2026-53016 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-53016, DEBIAN-CVE-2026-53016, GHSA-4rx4-73jx-c5r8, RLSA-2026:39494, ROOT-OS-DEBIAN-11-CVE-2026-53016, ROOT-OS-DEBIAN-12-CVE-2026-53016 and 3 more.