CVE-2019-9458

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Last Modified: UTC

ModerateModerate ImpactWhat does this mean?

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Description

A flaw was found in the Linux kernel's video driver. A race condition, leading to a use-after-free, could lead to a local privilege escalation. User interaction is not needed for exploitation.

A flaw was found in the Linux kernel's video driver. A race condition, leading to a use-after-free, could lead to a local privilege escalation. User interaction is not needed for exploitation.

Statement

This issue is rated as having Moderate impact, because of the need of additional privileges (usually local console user) to access the video device driver.

This issue is rated as having Moderate impact, because of the need of additional privileges (usually local console user) to access the video device driver.

Mitigation

To mitigate this issue, prevent modules v4l2-common, v4l2-dv-timings from being loaded if not being used for primary display. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.

Additional information

  • Bugzilla 1819377: kernel: use after free due to race condition in the video driver leads to local privilege escalation
  • CWE-362->CWE-416: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') leads to Use After Free
  • FAQ: Frequently asked questions about CVE-2019-9458

Common Vulnerability Scoring System (CVSS) Score Details

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 HatNVD

CVSS v3 Base Score

7

7

Attack Vector

Local

Local

Attack Complexity

High

High

Privileges Required

Low

Low

User Interaction

None

None

Scope

Unchanged

Unchanged

Confidentiality Impact

High

High

Integrity Impact

High

High

Availability Impact

High

High

CVSS v3 Vector

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

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

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

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