CVE-2026-43033 crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption
A logic error in Linux kernel crypto authencesn decryption causes incorrect data handling during out-of-place operations, potentially leading to data integrity issues.
- 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-2026-43033?
CVE-2026-43033 is a high-severity vulnerability in Linux kernel, published on 1 May 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: authencesn - Do not place hiseq at end of dst for out-of-place decryption
When decrypting data that is not in-place (src != dst), there is no need to save the high-order sequence bits in dst as it could simply be re-copied from the source.
However, the data to be hashed need to be rearranged accordingly.
Thanks,
Weakness: CWE-682
Which versions are affected by CVE-2026-43033?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43033?
Apply the vendor's patch.
Is CVE-2026-43033 being exploited?
There is no known exploitation of CVE-2026-43033 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-85430, BELL-CVE-2026-43033, DEBIAN-CVE-2026-43033, GHSA-r324-r22p-vp8m, ROOT-OS-DEBIAN-11-CVE-2026-43033, ROOT-OS-UBUNTU-2204-CVE-2026-43033 and 1 more.