CVE-2026-97590 s390/crypto: Fix missing scrub of temp buffers with PAES algorithm
An attacker with local access could potentially read sensitive cryptographic data from unscrubbed temporary buffers in the s390 PAES implementation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-97590?
CVE-2026-97590 is a vulnerability in Linux, published on 25 Sep 2026.
Official description
In the Linux kernel, the following vulnerability has been resolved:
s390/crypto: Fix missing scrub of temp buffers with PAES algorithm
In function ctr_paes_do_crypt() there is a buffer used to process remaining bytes < AES_BLOCK_SIZE. This buffer was not scrubbed and thus could lead to expose of unwanted data. Rework the code to explicitly scrub the buffer at the end of the function to avoid exposure of maybe sensitive data.
In function __xts_2keys_prep_param() change the existing scrub to clean the whole param block instead of just the key field.
Which versions are affected by CVE-2026-97590?
How do I fix CVE-2026-97590?
Apply the vendor's patch.
Is CVE-2026-97590 being exploited?
There is no known exploitation of CVE-2026-97590 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-97590, DEBIAN-CVE-2026-97590, GHSA-9wm4-m683-cr29, UBUNTU-CVE-2026-97590.