---
id: CVE-2026-43033
title: >-
  In the Linux kernel, the following vulnerability has been resolved:


  crypto: authencesn - Do not place hiseq at end of dst for out-of-place
  decryption


  When decrypting data that is not in-place (src != dst), there is

  no need to save the …
summary: >-
  In the Linux kernel, the following vulnerability has been resolved:


  crypto: authencesn - Do not place hiseq at end of dst for out-of-place
  decryption


  When decrypting data that is not in-place (src != dst), there is

  no need to save the …
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.3, < 5.10.254'
  - 'linux_kernel >= 5.11, < 5.15.204'
  - 'linux_kernel >= 5.16, < 6.1.170'
  - 'linux_kernel >= 6.2, < 6.6.137'
  - 'linux_kernel >= 6.7, < 6.12.85'
  - 'linux_kernel >= 6.13, < 6.18.22'
  - 'linux_kernel >= 6.19, < 6.19.12'
  - linux_kernel = 7.0
patched:
  - linux_kernel 6.19.12
published: '2026-05-01'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:19:26.957'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-43033'
references:
  - url: 'https://git.kernel.org/stable/c/153d5520c3f9fd62e71c7e7f9e34b59cf411e555'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5466e7d0cd9e4f9cef9d8f18f18b60e7bc1c77e5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/89fe118b6470119b20c04afc36e45b81a69ea11f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8c62f618576519dbed6816fafc623ce592953025'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/cded4002d22177e8deaca1f257ecd932c9582b6b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d0c4ff6812386880f30bc64c2921299cc4d7b47f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d589abd8b019b07075fda255ceab8c8e950cdb3f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e02494114ebf7c8b42777c6cd6982f113bfdbec7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-019113.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-082556.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-457936.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00135
epssPercentile: 0.02975
ingestedAt: '2026-09-08T15:33:26.989Z'
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-16T15:13:46.097130Z'
---

## Overview

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

crypto: authencesn - Do not place hiseq at end of dst for out-of-place decryption

When decrypting data that is not in-place (src != dst), there is
no need to save the high-order sequence bits in dst as it could
simply be re-copied from the source.

However, the data to be hashed need to be rearranged accordingly.


Thanks,

## Affected

- `linux_kernel >= 4.3, < 5.10.254`
- `linux_kernel >= 5.11, < 5.15.204`
- `linux_kernel >= 5.16, < 6.1.170`
- `linux_kernel >= 6.2, < 6.6.137`
- `linux_kernel >= 6.7, < 6.12.85`
- `linux_kernel >= 6.13, < 6.18.22`
- `linux_kernel >= 6.19, < 6.19.12`
- `linux_kernel = 7.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.19.12`