SB2023041921 - Privilege escalation in Linux kernel DVB driver

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Main Vulnerability Database SB2023041921

SB2023041921 - Privilege escalation in Linux kernel DVB driver

Published: April 19, 2023

Security Bulletin ID SB2023041921
Severity
Low
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2022-45884)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in drivers/media/dvb-core/dvbdev.c in Linux kernel related to dvb_register_device() function dynamically allocating fops. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.


2) Use-after-free (CVE-ID: CVE-2022-45919)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in drivers/media/dvb-core/dvb_ca_en50221.c in Linux kernel. A local user can trigger a race condition and execute arbitrary code with elevated privileges.

3) Use-after-free (CVE-ID: CVE-2022-45885)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in drivers/media/dvb-core/dvb_frontend.c in Linux kernel. A local user can trigger a race condition and execute arbitrary code with elevated privileges.



4) Use-after-free (CVE-ID: CVE-2022-45886)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in drivers/media/dvb-core/dvb_net.c in Linux kernel. A local user can trigger a race condition and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References