CVE-2026-97590
UnknownSummary
In the Linux kernel, the s390/crypto subsystem fails to scrub temporary buffers in the PAES algorithm. The buffer processing remaining bytes < AES_BLOCK_SIZE in ctr_paes_do_crypt() was not scrubbed, and __xts_2keys_prep_param() only scrubbed the key field instead of the whole parameter block.
Risk Assessment
Unscrubbed buffers may expose sensitive data (e.g., remnants of cryptographic material) to other processes or via memory disclosure.
Recommendation
Update the Linux kernel to a version containing the fix that explicitly scrubs buffers in ctr_paes_do_crypt() and the whole parameter block in __xts_2keys_prep_param().
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS