Kernel: xfrm: null pointer dereference in xfrm_update_ae_params()

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Summary

CVECVE-2023-3772
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-07-25 16:15:11 UTC
Updated2026-10-14 22:17:15 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 4.4 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.004520000 probability, percentile 0.376700000 (date 2026-10-14)

Problem Types: CWE-476 | CWE-476 NULL Pointer Dereference

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary4.4MEDIUMCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1CNACVSS5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 12.0 All All All
Operating System Fedoraproject Fedora - All All All
Operating System Linux Linux Kernel - All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux 9.0 All All All
Operating System Redhat Enterprise Linux For Real Time 8.0 All All All
Operating System Redhat Enterprise Linux For Real Time For Nfv 8.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:4.18.0-513.5.1.rt7.307.el8_9 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8 unaffected 0:4.18.0-513.5.1.el8_9 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support unaffected 0:4.18.0-372.87.1.el8_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support unaffected 0:4.18.0-477.43.1.el8_8 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:5.14.0-362.8.1.el9_3 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 9 unaffected 0:5.14.0-362.8.1.el9_3 * rpm Not specified
CNA Red Hat Red Hat Virtualization 4 For Red Hat Enterprise Linux 8 unaffected 0:4.18.0-372.87.1.el8_6 * rpm Not specified
CNA Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
CNA Red Hat Red Hat Enterprise Linux 9 Not specified Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected V1.1 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
oss-security - Re: CVE-2023-3772: Linux kernel: xfrm_update_ae_params NULL pointer dereference af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
Debian -- Security Information -- DSA-5492-1 linux af854a3a-2127-422b-91ae-364da2661108 www.debian.org
oss-security - CVE-2023-3772: Linux kernel: xfrm_update_ae_params NULL pointer dereference af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
Red Hat af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
[SECURITY] [DLA 3623-1] linux-5.10 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
Red Hat af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Red Hat af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
cert-portal.siemens.com/productcert/html/ssa-794697.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
Red Hat af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
Red Hat af854a3a-2127-422b-91ae-364da2661108 access.redhat.com
cve-details af854a3a-2127-422b-91ae-364da2661108 access.redhat.com Third Party Advisory
2218943 – (CVE-2023-3772) CVE-2023-3772 kernel: xfrm: NULL pointer dereference in xfrm_update_ae_params() af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory
lists.debian.org/debian-lts-announce/2024/01/msg00004.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank Lin Ma (ZJU & Ant Security Light-Year Lab) for reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2023-06-29T00:00:00.000ZReported to Red Hat.
CNA2023-07-21T00:00:00.000ZMade public.

Legacy QID Mappings

  • 160949 Oracle Enterprise Linux Security Update for unbreakable enterprise kernel (ELSA-2023-12842)
  • 161066 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-6583)
  • 161147 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-7077)
  • 199803 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6415-1)
  • 199842 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6440-1)
  • 199843 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6439-1)
  • 199849 Ubuntu Security Notification for Linux kernel (Azure) Vulnerabilities (USN-6440-2)
  • 199855 Ubuntu Security Notification for Linux kernel (AWS) Vulnerabilities (USN-6439-2)
  • 199864 Ubuntu Security Notification for Linux kernel (HWE) Vulnerabilities (USN-6440-3)
  • 199878 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6465-1)
  • 199879 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6464-1)
  • 199882 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6462-1)
  • 199883 Ubuntu Security Notification for Linux kernel (NVIDIA) Vulnerabilities (USN-6466-1)
  • 199886 Ubuntu Security Notification for Linux kernel (Raspberry Pi) Vulnerabilities (USN-6465-2)
  • 199903 Ubuntu Security Notification for Linux kernel (GKE) Vulnerabilities (USN-6465-3)
  • 199919 Ubuntu Security Notification for Linux kernel (IoT) Vulnerabilities (USN-6462-2)
  • 199955 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6516-1)
  • 199957 Ubuntu Security Notification for Linux kernel (StarFive) Vulnerabilities (USN-6520-1)
  • 242399 Red Hat Update for kernel security (RHSA-2023:6583)
  • 242434 Red Hat Update for kernel-rt security (RHSA-2023:6901)
  • 242451 Red Hat Update for kernel security (RHSA-2023:7077)
  • 242789 Red Hat Update for kernel (RHSA-2024:0575)
  • 242855 Red Hat Update for kernel (RHSA-2024:0412)
  • 356357 Amazon Linux Security Advisory for kernel : ALAS-2023-1838
  • 356409 Amazon Linux Security Advisory for kernel : ALAS2-2023-2264
  • 356606 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2023-053
  • 379043 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-2023:0136)
  • 390290 Oracle Managed Virtualization (VM) Server for x86 Security Update for kernel (OVMSA-2023-0023)
  • 6000220 Debian Security Update for linux (DSA 5492-1)
  • 6000265 Debian Security Update for linux-5.10 (DLA 3623-1)
  • 6000429 Debian Security Update for linux (DLA 3710-1)
  • 673406 EulerOS Security Update for kernel (EulerOS-SA-2023-3182)
  • 673449 EulerOS Security Update for kernel (EulerOS-SA-2023-2898)
  • 673484 EulerOS Security Update for kernel (EulerOS-SA-2023-3033)
  • 673498 EulerOS Security Update for kernel (EulerOS-SA-2023-3132)
  • 673563 EulerOS Security Update for kernel (EulerOS-SA-2024-1144)
  • 673732 EulerOS Security Update for kernel (EulerOS-SA-2023-3010)
  • 673848 EulerOS Security Update for kernel (EulerOS-SA-2023-3217)
  • 673970 EulerOS Security Update for kernel (EulerOS-SA-2023-2879)
  • 754832 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3600-1)
  • 754833 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3599-1)
  • 754855 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3656-1)
  • 754863 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3680-1)
  • 754866 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3684-1)
  • 754867 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3683-1)
  • 754868 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3682-1)
  • 754869 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3681-1)
  • 754876 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3687-1)
  • 754883 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3705-1)
  • 754884 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3704-1)
  • 754899 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3599-2)
  • 754900 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3600-2)
  • 754901 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3704-2)
  • 754903 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3683-2)
  • 755026 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3964-1)
  • 755037 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3971-1)
  • 755038 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3969-1)
  • 755043 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:3988-1)
  • 941453 AlmaLinux Security Update for kernel (ALSA-2023:7077)

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