Linux Kernel IP Framework net/xfrm/xfrm_user.c xfrma_policy out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel. This affects the function xfrma_policy of the file net/xfrm/xfrm_user.c of the component IP Framework. Executing a manipulation can lead to out-of-bounds. This vulnerability appears as CVE-2023-3773. The attack requires local access. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability has been found in Linux Kernel (Operating System) (unknown version) and classified as problematic. This vulnerability affects the function xfrma_policy of the file net/xfrm/xfrm_user.c of the component IP Framework. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The weakness was presented 07/26/2023. The advisory is shared for download at access.redhat.com. This vulnerability was named CVE-2023-3773 since 07/19/2023. There are known technical details, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 269639 (Linux Distros Unpatched Vulnerability : CVE-2023-53516), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at lore.kernel.org.

The vulnerability is also documented in the databases at Tenable (269639), EUVD (EUVD-2023-44406) and CERT Bund (WID-SEC-2023-1882). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • Open Source Linux Kernel
  • IBM Spectrum Protect
  • Oracle VM
  • Dell NetWorker

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.4
NVD Vector: 🔍

CNA Base Score: 5.5
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 269639
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2023-53516

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: lore.kernel.org

Timelineinfo

07/19/2023 🔍
07/26/2023 +7 days 🔍
07/26/2023 +0 days 🔍
11/12/2025 +840 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: access.redhat.com
Status: Confirmed

CVE: CVE-2023-3773 (🔍)
GCVE (CVE): GCVE-0-2023-3773
GCVE (VulDB): GCVE-100-235408
EUVD: 🔍
CERT Bund: WID-SEC-2023-1882 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 07/26/2023 09:42
Updated: 11/12/2025 08:54
Changes: 07/26/2023 09:42 (52), 08/18/2023 15:42 (10), 07/24/2025 00:37 (16), 10/12/2025 00:03 (2), 11/12/2025 08:54 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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