CVE-2026-52972 crypto: af_alg - Cap AEAD AD length to 0x80000000
An integer overflow in the Linux kernel's AF_ALG interface allows attackers to cause buffer size miscalculations, potentially leading to denial of service or code execution.
- 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-2026-52972?
CVE-2026-52972 is a medium-severity 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: af_alg - Cap AEAD AD length to 0x80000000
In order to prevent arithmetic overflows when checking the TX buffer size, cap the associated data length to 0x80000000.
Weakness: CWE-190
Which versions are affected by CVE-2026-52972?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-52972?
Apply the vendor's patch.
Is CVE-2026-52972 being exploited?
There is no known exploitation of CVE-2026-52972 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-52972, DEBIAN-CVE-2026-52972, GHSA-9qr8-jp95-w4m5, ROOT-OS-DEBIAN-11-CVE-2026-52972, ROOT-OS-DEBIAN-12-CVE-2026-52972, ROOT-OS-UBUNTU-2204-CVE-2026-52972 and 2 more.