Home/CVE/A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a
CVE

CVE-2023-3772

A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a

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.

MEDIUM · CVSS 5.5 EPSS 0.00012
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

6
redhat enterprise linuxall versions
redhat enterprise linux for real timeall versions
redhat enterprise linux for real time for nfvall versions
fedoraproject fedoraall versions
linux kernelall versions
debian linuxall versions
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD25 Jul 2023 · 04:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

30
rhsaRHSA-2023:6583Moderate
rhsaRHSA-2023:7077Moderate
rhsaRHSA-2024:0575Moderate
suse-csafSUSE-SU-2025:4315-1
suse-csafSUSE-SU-2025:4141-1
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/errata/RHSA-2023:6901Third Party Advisory
https://access.redhat.com/security/cve/CVE-2023-3772Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2218943Issue TrackingThird Party Advisory
http://www.openwall.com/lists/oss-security/2023/08/10/1
http://www.openwall.com/lists/oss-security/2023/08/10/3
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
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