VDB-240980 · CVE-2023-39193 · ZDI-23-1492

Linux Kernel up to 6.5-rc6 XFRM net/xfrm/xfrm_user.c xfrm_dump_sa out-of-bounds

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.2	$0-$5k	0.00

Summaryinfo

A vulnerability described as problematic has been identified in Linux Kernel up to 6.5-rc6. This vulnerability affects the function xfrm_dump_sa of the file net/xfrm/xfrm_user.c of the component XFRM. Such manipulation leads to out-of-bounds. This vulnerability is referenced as CVE-2023-39193. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.5-rc6 (Operating System) and classified as problematic. Affected by this issue is the function xfrm_dump_sa of the file net/xfrm/xfrm_user.c of the component XFRM. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality.

The weakness was published 09/30/2023 as ZDI-23-1492. The advisory is shared for download at zerodayinitiative.com. This vulnerability is handled as CVE-2023-39193 since 07/25/2023. There are known technical details, but no exploit is available.

Upgrading to version 6.5-rc7 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch dfa73c17d55b921e1d4e154976de35317e43a93a is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-42928). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Operating System

Vendor

Linux

Name

Kernel

Version

License

open-source

Website

Vendor: https://www.kernel.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.2
VulDB Meta Temp Score: 5.2

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.0
NVD Vector: 🔍

CNA Base Score: 6.1
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.5-rc7
Patch: dfa73c17d55b921e1d4e154976de35317e43a93a

Timelineinfo

07/25/2023 🔍
09/30/2023 +67 days 🔍
09/30/2023 +0 days 🔍
07/24/2025 +662 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: ZDI-23-1492
Status: Confirmed

CVE: CVE-2023-39193 (🔍)
GCVE (CVE): GCVE-0-2023-39193
GCVE (VulDB): GCVE-100-240980
EUVD: 🔍

Entryinfo

Created: 09/30/2023 14:53
Updated: 07/24/2025 01:02
Changes: 09/30/2023 14:53 (24), 09/30/2023 14:54 (22), 10/22/2023 20:34 (1), 10/22/2023 20:42 (21), 09/14/2024 00:15 (20), 07/24/2025 01:02 (1)
Complete: 🔍
Cache ID: 216::103