---
id: CVE-2026-97590
title: |-
  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
summary: |-
  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. …
severity: medium
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <
    7d1456d54b3c784cc2917c219a528092cefe30cd
  - >-
    Linux >= 6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <
    d7159d2132e9aa51af7acb51c6742d9b30f987b3
  - >-
    Linux >= 6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <
    19a218b46b2471d370c11fb52040f36ac8d05d23
  - Linux 6.16
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:10.207'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97590'
references:
  - url: 'https://git.kernel.org/stable/c/19a218b46b2471d370c11fb52040f36ac8d05d23'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7d1456d54b3c784cc2917c219a528092cefe30cd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d7159d2132e9aa51af7acb51c6742d9b30f987b3'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97590.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-97590'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2541114'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-97590'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97590'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97590.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-09-25T11:06:38.905Z'
epss: 0.00198
epssPercentile: 0.09466
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cvssSource: vendor
cwe:
  - CWE-459
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97590.json)