---
id: CVE-2022-3635
title: >-
  A vulnerability, which was classified as critical, has been found in Linux
  Kernel
summary: >-
  A vulnerability, which was classified as critical, has been found in Linux
  Kernel. Affected by this issue is the function tst_timer of the file
  drivers/atm/idt77252.c of the component IPsec. The manipulation leads to use
  after free. It i…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-119
  - CWE-362
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 2.6.12, < 4.9.326'
  - 'linux_kernel >= 4.10, < 4.14.291'
  - 'linux_kernel >= 4.15, < 4.19.256'
  - 'linux_kernel >= 4.20, < 5.4.211'
  - 'linux_kernel >= 5.5, < 5.10.138'
  - 'linux_kernel >= 5.11, < 5.15.63'
  - 'linux_kernel >= 5.16, < 5.19.4'
  - debian_linux = 10.0
patched:
  - linux_kernel 5.19.4
published: '2022-10-21'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T14:17:27.017'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2022-3635'
references:
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git/commit/?id=3f4093e2bf4673f218c0bf17d8362337c400e77b
    label: cna@vuldb.com
  - url: 'https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/?id.211934'
    label: cna@vuldb.com
  - url: >-
      https://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next.git/commit/?id=3f4093e2bf4673f218c0bf17d8362337c400e77b
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://vuldb.com/?id.211934'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
  - exploit-available
epss: 0.00426
epssPercentile: 0.3506
ingestedAt: '2026-10-14T15:36:13.925Z'
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2025-04-14T16:59:17.924201Z'
---

## Overview

A vulnerability, which was classified as critical, has been found in Linux Kernel. Affected by this issue is the function tst_timer of the file drivers/atm/idt77252.c of the component IPsec. The manipulation leads to use after free. It is recommended to apply a patch to fix this issue. VDB-211934 is the identifier assigned to this vulnerability.

## Affected

- `linux_kernel >= 2.6.12, < 4.9.326`
- `linux_kernel >= 4.10, < 4.14.291`
- `linux_kernel >= 4.15, < 4.19.256`
- `linux_kernel >= 4.20, < 5.4.211`
- `linux_kernel >= 5.5, < 5.10.138`
- `linux_kernel >= 5.11, < 5.15.63`
- `linux_kernel >= 5.16, < 5.19.4`
- `debian_linux = 10.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 5.19.4`