CVE-2019-9455

Description

A flaw was found in the Linux kernel's video driver. A kernel pointer lead, due to a WARN_ON statement could lead to a local information disclosure with system execution privileges. User interaction is not needed for exploitation. The highest threat from this vulnerability is to data confidentiality.

Statement

This issue is marked as having Low impact because the information leak is very subtle and can be only used to break KASLR and not provide access to kernel memory content.

Mitigation

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score2.32.3N/A
Attack VectorLocalLocalN/A
Attack ComplexityLowLowN/A
Privileges RequiredHighHighN/A
User InteractionNoneNoneN/A
ScopeUnchangedUnchangedN/A
ConfidentialityLowLowN/A
Integrity ImpactNoneNoneN/A
Availability ImpactNoneNoneN/A

Vector

Red Hat: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

NVD: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Red Hat CVSS v3 Score Explanation

The leak only shows kernel memory addresses hence can be used to break KASLR. The leak does not provide access to kernel memory.

Understanding the Weakness (CWE)

CWE-200

Confidentiality

Technical Impact: Read Application Data

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