Xen 4.14/4.15/4.16 Syscall memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Xen 4.14/4.15/4.16. This issue affects some unknown processing of the component Syscall Handler. Executing a manipulation can lead to memory corruption. This vulnerability is registered as CVE-2022-42331. No exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical was found in Xen 4.14/4.15/4.16 (Virtualization Software). This vulnerability affects an unknown code block of the component Syscall Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

x86: speculative vulnerability in 32bit SYSCALL path Due to an oversight in the very original Spectre/Meltdown security work (XSA-254), one entrypath performs its speculation-safety actions too late. In some configurations, there is an unprotected RET instruction which can be attacked with a variety of speculative attacks.

The weakness was published 03/21/2023. The advisory is shared for download at xenbits.xenproject.org. This vulnerability was named CVE-2022-42331 since 10/03/2022. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 257886 (Linux Distros Unpatched Vulnerability : CVE-2022-42331), which helps to determine the existence of the flaw in a target environment.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Tenable (257886). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 257886
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2022-42331

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/03/2022 🔍
03/21/2023 +169 days 🔍
03/21/2023 +0 days 🔍
08/30/2025 +893 days 🔍

Sourcesinfo

Advisory: FEDORA-2023-703f133eb3
Status: Confirmed

CVE: CVE-2022-42331 (🔍)
GCVE (CVE): GCVE-0-2022-42331
GCVE (VulDB): GCVE-100-223480

Entryinfo

Created: 03/21/2023 15:50
Updated: 08/30/2025 21:42
Changes: 03/21/2023 15:50 (39), 04/12/2023 10:30 (1), 04/12/2023 10:35 (10), 08/30/2025 21:42 (17)
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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