---
id: CVE-2023-3772
title: >-
  A flaw was found in the Linux kernel’s IP framework for transforming packets
  (XFRM subsystem)
summary: >-
  A flaw was found in the Linux kernel’s IP framework for transforming packets
  (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN
  privileges to directly dereference a NULL pointer in xfrm_update_ae_params(),
  leading…
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
  - CWE-476
vendor: redhat
product: enterprise_linux
affected:
  - enterprise_linux = 8.0
  - enterprise_linux = 9.0
  - enterprise_linux_for_real_time = 8.0
  - enterprise_linux_for_real_time_for_nfv = 8.0
  - fedora
  - linux_kernel
  - debian_linux = 10.0
  - debian_linux = 12.0
published: '2023-07-25'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T22:17:15.513'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-3772'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2023:6583'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2023:6901'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2023:7077'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2024:0412'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2024:0575'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2023-3772'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2218943'
    label: secalert@redhat.com
  - url: 'http://www.openwall.com/lists/oss-security/2023/08/10/1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'http://www.openwall.com/lists/oss-security/2023/08/10/3'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2023:6583'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2023:6901'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2023:7077'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2024:0412'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2024:0575'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/security/cve/CVE-2023-3772'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2218943'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://www.debian.org/security/2023/dsa-5492'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-794697.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
epss: 0.00452
epssPercentile: 0.3767
ingestedAt: '2026-10-14T23:00:01.999Z'
---

## Overview

A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to directly dereference a NULL pointer in xfrm_update_ae_params(), leading to a possible kernel crash and denial of service.

## Affected

- `enterprise_linux = 8.0`
- `enterprise_linux = 9.0`
- `enterprise_linux_for_real_time = 8.0`
- `enterprise_linux_for_real_time_for_nfv = 8.0`
- `fedora`
- `linux_kernel`
- `debian_linux = 10.0`
- `debian_linux = 12.0`

## Remediation

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