---
id: CVE-2026-23060
title: 'crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec

  authencesn assumes an ESP/ESN-formatted AAD. When assoclen is shorter than
  the minimum exp…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    df22c9a65e9a9daa368a72fed596af9d7d5876bb
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    fee86edf5803f1d1f19e3b4f2dacac241bddfa48
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    767e8349f7e929b7dd95c08f0b4cb353459b365e
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    b0a9609283a5c852addb513dafa655c61eebc1ef
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    161bdc90fce25bd9890adc67fa1c8563a7acbf40
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    9532ff0d0e90ff78a214299f594ab9bac81defe4
  - >-
    Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 <
    2397e9264676be7794f8f7f1e9763d90bd3c7335
  - Linux 4.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-10T20:40:49.111568Z'
published: '2026-02-04'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T08:44:45.237Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-23060'
references:
  - url: 'https://git.kernel.org/stable/c/df22c9a65e9a9daa368a72fed596af9d7d5876bb'
  - url: 'https://git.kernel.org/stable/c/fee86edf5803f1d1f19e3b4f2dacac241bddfa48'
  - url: 'https://git.kernel.org/stable/c/767e8349f7e929b7dd95c08f0b4cb353459b365e'
  - url: 'https://git.kernel.org/stable/c/b0a9609283a5c852addb513dafa655c61eebc1ef'
  - url: 'https://git.kernel.org/stable/c/161bdc90fce25bd9890adc67fa1c8563a7acbf40'
  - url: 'https://git.kernel.org/stable/c/9532ff0d0e90ff78a214299f594ab9bac81defe4'
  - url: 'https://git.kernel.org/stable/c/2397e9264676be7794f8f7f1e9763d90bd3c7335'
tags:
  - cve.org
epss: 0.00131
epssPercentile: 0.02189
ingestedAt: '2026-09-08T15:33:26.994Z'
---

## Overview

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

crypto: authencesn - reject too-short AAD (assoclen<8) to match ESP/ESN spec

authencesn assumes an ESP/ESN-formatted AAD. When assoclen is shorter than
the minimum expected length, crypto_authenc_esn_decrypt() can advance past
the end of the destination scatterlist and trigger a NULL pointer dereference
in scatterwalk_map_and_copy(), leading to a kernel panic (DoS).

Add a minimum AAD length check to fail fast on invalid inputs.

## Affected

- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < df22c9a65e9a9daa368a72fed596af9d7d5876bb`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < fee86edf5803f1d1f19e3b4f2dacac241bddfa48`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < 767e8349f7e929b7dd95c08f0b4cb353459b365e`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < b0a9609283a5c852addb513dafa655c61eebc1ef`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < 161bdc90fce25bd9890adc67fa1c8563a7acbf40`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < 9532ff0d0e90ff78a214299f594ab9bac81defe4`
- `Linux >= 104880a6b470958ddc30e139c41aa4f6ed3a5234 < 2397e9264676be7794f8f7f1e9763d90bd3c7335`
- `Linux 4.3`

## Remediation

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