CVE-2026-97590
Received Received - Intake

s390/crypto: Information Exposure in PAES Algorithm

Publication date: 2026-09-25

Last updated on: 2026-09-25

Assigner: kernel.org

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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-25
Last Modified
2026-09-25
Generated
2026-09-25
AI Q&A
2026-09-25
EPSS Evaluated
N/A
NVD
CVE-2026-97590
EUVD
EUVD-2026-86898

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a vulnerability in the Linux kernel's s390/crypto module. It involves a buffer used in the PAES encryption algorithm that was not properly cleared after use. This could allow sensitive data to remain exposed in memory.

Detection Guidance

This vulnerability is specific to the Linux kernel's s390/crypto module and involves improper scrubbing of temporary buffers. Detection requires checking if your kernel version includes the affected code paths. Use uname -a to check your kernel version and grep for s390/crypto modules in /proc/modules or /lib/modules/$(uname -r)/kernel/crypto.

Impact Analysis

If exploited, this flaw could lead to unauthorized access to sensitive data processed by the affected system. Attackers might retrieve remnants of encrypted or decrypted data from memory.

Compliance Impact

This vulnerability could violate data protection requirements under GDPR and HIPAA by potentially exposing sensitive personal or health information. Organizations must address it to maintain compliance.

Mitigation Strategies

Apply the latest kernel update from your Linux distribution to patch the s390/crypto module. If no patch is available, disable the PAES algorithm in your kernel configuration or restrict access to s390 systems until the fix is applied.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-97590. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart