---
id: CVE-2026-23060
title: |-
  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
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: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 4.3, < 5.10.249'
  - 'linux_kernel >= 5.11, < 5.15.199'
  - 'linux_kernel >= 5.16, < 6.1.162'
  - 'linux_kernel >= 6.2, < 6.6.122'
  - 'linux_kernel >= 6.7, < 6.12.68'
  - 'linux_kernel >= 6.13, < 6.18.8'
  - linux_kernel = 6.19
patched:
  - linux_kernel 6.18.8
published: '2026-02-04'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:18:40.733'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-23060'
references:
  - url: 'https://git.kernel.org/stable/c/161bdc90fce25bd9890adc67fa1c8563a7acbf40'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2397e9264676be7794f8f7f1e9763d90bd3c7335'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/767e8349f7e929b7dd95c08f0b4cb353459b365e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9532ff0d0e90ff78a214299f594ab9bac81defe4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b0a9609283a5c852addb513dafa655c61eebc1ef'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/df22c9a65e9a9daa368a72fed596af9d7d5876bb'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/fee86edf5803f1d1f19e3b4f2dacac241bddfa48'
    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-457936.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00181
epssPercentile: 0.07569
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-10T20:40:49.111568Z'
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_kernel >= 4.3, < 5.10.249`
- `linux_kernel >= 5.11, < 5.15.199`
- `linux_kernel >= 5.16, < 6.1.162`
- `linux_kernel >= 6.2, < 6.6.122`
- `linux_kernel >= 6.7, < 6.12.68`
- `linux_kernel >= 6.13, < 6.18.8`
- `linux_kernel = 6.19`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.18.8`