What’s Vulnerable › Vulnerabilities

CVE-2026-97590: s390/crypto: Fix missing scrub of temp buffers with PAES algorithm

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-10-19

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.

Affected products

• Linux kernel: 6.16 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/19a218b46b2471d370c11fb52040f36ac8d05d23
• https://git.kernel.org/stable/c/7d1456d54b3c784cc2917c219a528092cefe30cd
• https://git.kernel.org/stable/c/d7159d2132e9aa51af7acb51c6742d9b30f987b3

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