CVE-2023-3773 MEDIUM

CVE-2023-3773: Kernel: xfrm: out-of-bounds read of xfrma_mtimer_thresh nlattr

Vendor Red Hat
Product Red Hat Enterprise Linux 6
Weakness CWE-125
Published July 25, 2023
Last update November 14, 2025

CVSS base score

5.5/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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 cause a 4 byte out-of-bounds read of XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data to userspace.

Key dates

02Disclosure timeline

July 25, 2023 CVE published
November 14, 2025 Record updated