CVE-2023-3772

Kernel: xfrm: null pointer dereference in xfrm_update_ae_params()

MEDIUM
4.4
CVSS Score
Published: July 25, 2023 at 03:47 PM UTC
Updated: October 14, 2026 at 10:17 PM UTC
6 products affected across 4 vendorsLinux KernelDebian LinuxFedora

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Severity
MEDIUM4.4
Exploit prediction
EPSS 0.5%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
All versions
Vendor states this is fixed in 0:4.18.0-372.87.1.el8_6 (unaffected)
Vendor states this is fixed in 0:4.18.0-477.43.1.el8_8 (unaffected)
Vendor states this is fixed in 0:4.18.0-513.5.1.el8_9 (unaffected)
Vendor states this is fixed in 0:4.18.0-513.5.1.rt7.307.el8_9 (unaffected)
Vendor states this is fixed in 0:5.14.0-362.8.1.el9_3 (unaffected)
Vendor states this is fixed in 6 (unknown)
Vendor states this is fixed in 7 (unknown)

References (14)

Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2023:6583
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2023:6901
Vendor Advisoryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/errata/RHSA-2023:7077
VDB Entryx_refsource_REDHATThird Party Advisory
https://access.redhat.com/security/cve/CVE-2023-3772
Issue Trackingx_refsource_REDHATThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2218943
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2023/08/10/1

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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