---
id: CVE-2026-43033
title: >-
  crypto: authencesn - Do not place hiseq at end of dst for out-of-place
  decryption
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'
cvssSource: cna
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    8c62f618576519dbed6816fafc623ce592953025
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    d589abd8b019b07075fda255ceab8c8e950cdb3f
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    5466e7d0cd9e4f9cef9d8f18f18b60e7bc1c77e5
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    d0c4ff6812386880f30bc64c2921299cc4d7b47f
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    89fe118b6470119b20c04afc36e45b81a69ea11f
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    153d5520c3f9fd62e71c7e7f9e34b59cf411e555
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    cded4002d22177e8deaca1f257ecd932c9582b6b
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    e02494114ebf7c8b42777c6cd6982f113bfdbec7
  - Linux 4.3
published: '2026-05-01'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T08:48:36.612Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43033'
references:
  - url: 'https://git.kernel.org/stable/c/8c62f618576519dbed6816fafc623ce592953025'
  - url: 'https://git.kernel.org/stable/c/d589abd8b019b07075fda255ceab8c8e950cdb3f'
  - url: 'https://git.kernel.org/stable/c/5466e7d0cd9e4f9cef9d8f18f18b60e7bc1c77e5'
  - url: 'https://git.kernel.org/stable/c/d0c4ff6812386880f30bc64c2921299cc4d7b47f'
  - url: 'https://git.kernel.org/stable/c/89fe118b6470119b20c04afc36e45b81a69ea11f'
  - url: 'https://git.kernel.org/stable/c/153d5520c3f9fd62e71c7e7f9e34b59cf411e555'
  - url: 'https://git.kernel.org/stable/c/cded4002d22177e8deaca1f257ecd932c9582b6b'
  - url: 'https://git.kernel.org/stable/c/e02494114ebf7c8b42777c6cd6982f113bfdbec7'
tags:
  - cve.org
epss: 0.00184
epssPercentile: 0.07035
ingestedAt: '2026-09-08T15:33:26.989Z'
---

## 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 >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < 8c62f618576519dbed6816fafc623ce592953025`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < d589abd8b019b07075fda255ceab8c8e950cdb3f`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < 5466e7d0cd9e4f9cef9d8f18f18b60e7bc1c77e5`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < d0c4ff6812386880f30bc64c2921299cc4d7b47f`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < 89fe118b6470119b20c04afc36e45b81a69ea11f`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < 153d5520c3f9fd62e71c7e7f9e34b59cf411e555`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < cded4002d22177e8deaca1f257ecd932c9582b6b`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < e02494114ebf7c8b42777c6cd6982f113bfdbec7`
- `Linux 4.3`

## Remediation

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