Linux Kernel up to 6.6.6 VMM arch/x86/coco/tdx/tdx.c tdx_early_init/sme_early_init privilege escalation

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.
7.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.6.6 and classified as problematic. Affected is the function tdx_early_init/sme_early_init of the file arch/x86/coco/tdx/tdx.c of the component VMM Handler. This manipulation causes an unknown weakness. This vulnerability is tracked as CVE-2024-25744. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 6.6.6 (Operating System) and classified as problematic. Affected by this vulnerability is the function tdx_early_init/sme_early_init of the file arch/x86/coco/tdx/tdx.c of the component VMM Handler. The impact remains unknown. The summary by CVE is:

In the Linux kernel before 6.6.7, an untrusted VMM can trigger int80 syscall handling at any given point. This is related to arch/x86/coco/tdx/tdx.c and arch/x86/mm/mem_encrypt_amd.c.

The weakness was disclosed 02/12/2024. The advisory is shared at git.kernel.org. This vulnerability is known as CVE-2024-25744 since 02/12/2024. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 210741 (Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-7100-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.7 eliminates this vulnerability. The upgrade is hosted for download at cdn.kernel.org. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (210741). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.1
VulDB Meta Temp Score: 7.1

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 210741
Nessus Name: Ubuntu 20.04 LTS : Linux kernel vulnerabilities (USN-7100-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 6.6.7
Patch: git.kernel.org

Timelineinfo

02/12/2024 🔍
02/12/2024 +0 days 🔍
02/12/2024 +0 days 🔍
11/11/2024 +273 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2024-25744 (🔍)
GCVE (CVE): GCVE-0-2024-25744
GCVE (VulDB): GCVE-100-253417

Entryinfo

Created: 02/12/2024 08:51
Updated: 11/11/2024 22:44
Changes: 02/12/2024 08:51 (43), 09/06/2024 16:32 (26), 11/11/2024 22:44 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Interested in the pricing of exploits?

See the underground prices here!