CVE-2023-3773
Kernel: xfrm: out-of-bounds read of xfrma_mtimer_thresh nlattr
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-125 |
| Vendor | red hat |
| Product | red hat enterprise linux 9 |
| Published | Jul 25, 2023 |
| Last Updated | Nov 14, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 6
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 7
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2023:6583 access.redhat.com: https://access.redhat.com/security/cve/CVE-2023-3773 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2218944 lists.debian.org: https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html debian.org: https://www.debian.org/security/2023/dsa-5492
Credits
Red Hat would like to thank Lin Ma (ZJU & Ant Security Light-Year Lab) for reporting this issue.