---
id: CVE-2026-97589
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  s390/crypto: Fix wrong return code to engine in asynch callbacks

  When crypto_finalize_hash_request() or
  crypto_finalize_skcipher_request() explicitly completes a reque…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  s390/crypto: Fix wrong return code to engine in asynch callbacks

  When crypto_finalize_hash_request() or
  crypto_finalize_skcipher_request() explicitly completes a reque…
severity: high
cvss: 7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <
    972e0d9b7d1d112240ccde1f1be85bf9ffaa1720
  - >-
    Linux >= 6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <
    5480291aa848e19e61175abfd457933516db70c6
  - >-
    Linux >= 6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <
    ac1481320110b803ab9b79ab4d2ca11a74fc05f2
  - Linux 6.16
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T15:18:00.547'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-97589'
references:
  - url: 'https://git.kernel.org/stable/c/5480291aa848e19e61175abfd457933516db70c6'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/972e0d9b7d1d112240ccde1f1be85bf9ffaa1720'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ac1481320110b803ab9b79ab4d2ca11a74fc05f2'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.906Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

s390/crypto: Fix wrong return code to engine in asynch callbacks

When crypto_finalize_hash_request() or
crypto_finalize_skcipher_request() explicitly completes a request, the
do_one_request callback must return 0 to indicate successful
handling. Returning a negative error code causes the crypto engine to
assume the driver failed to take ownership and triggers a second
completion via crypto_request_complete(), resulting in a double
completion. This pattern occurs in paes_s390.c 4 times and once in
phmac_s390.c.

Fixed in phmac_do_one_request() and all four paes do_one_request
callbacks (ecb, cbc, ctr, xts) by returning 0 after explicit
finalization instead of propagating the error code.

## Remediation

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