CVE-2023-3772: Kernel: xfrm: null pointer dereference in xfrm_update_ae_params()

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-07-25 · updated 2026-10-14
Weakness: CWE-476

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 products

Debian Linux: 10.0, 12.0
Fedoraproject Fedora: all versions
Linux kernel: all versions
Red Hat Enterprise Linux: 8.0, 9.0
RedHat Enterprise Linux For Real Time: 8.0
RedHat Enterprise Linux For Real Time For Nfv: 8.0

References

https://access.redhat.com/errata/RHSA-2023:6583
https://access.redhat.com/errata/RHSA-2023:6901
https://access.redhat.com/errata/RHSA-2023:7077
https://access.redhat.com/errata/RHSA-2024:0412
https://access.redhat.com/errata/RHSA-2024:0575
https://access.redhat.com/security/cve/CVE-2023-3772
https://bugzilla.redhat.com/show_bug.cgi?id=2218943
http://www.openwall.com/lists/oss-security/2023/08/10/1
http://www.openwall.com/lists/oss-security/2023/08/10/3
https://access.redhat.com/errata/RHSA-2023:6583
https://access.redhat.com/errata/RHSA-2023:6901
https://access.redhat.com/errata/RHSA-2023:7077

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