CVE-2023-3773

Kernel: xfrm: out-of-bounds read of xfrma_mtimer_thresh nlattr

Published Jul 25, 2023 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
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 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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source ID Title
Debian DLA Debian DLA DLA-3623-1 linux-5.10 security update
Debian DSA Debian DSA DSA-5492-1 linux security update
EUVD EUVD EUVD-2023-44406 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.
Ubuntu USN Ubuntu USN USN-6415-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6534-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6534-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6534-3 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6549-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6549-2 Linux kernel (GKE) vulnerabilities
Ubuntu USN Ubuntu USN USN-6549-3 Linux kernel (Low Latency) vulnerabilities
Ubuntu USN Ubuntu USN USN-6549-4 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-6549-5 Linux kernel vulnerabilities
History
Type Values Removed Values Added
First Time appeared Redhat rhel Els
CPEs cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:8
cpe:/o:redhat:rhel_els:6
cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat rhel Els
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 7, 2026, 1:41 PM
Reserved
Jul 19, 2023, 1:55 PM
Status
Modified
Published
Jul 25, 2023, 4:15 PM
Modified
Nov 7, 2026, 2:16 PM
Severity
Moderate
Public date
Jul 23, 2023, 12:00 AM