QID 198512

Date Published: 2021-09-28

QID 198512: Ubuntu Security Notification for Linux kernel (Raspberry Pi) Vulnerabilities (USN-5071-3)

The kvm hypervisor implementation in the linux kernel did not properly perform reference counting in some situations, leading to a use-after-free vulnerability.
The joystick device interface in the linux kernel did not properly validate data passed via an ioctl().

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

an attacker who could start and control a vm could possibly use this to expose sensitive information or execute arbitrary code. (
Cve-2021-22543).
A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code on systems with a joystick device registered. (
Cve-2021-3612).

  • CVSS V3 rated as High - 7.8 severity.
  • CVSS V2 rated as High - 7.2 severity.
    • Solution
    Refer to Ubuntu advisory: USN-5071-3 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 198512

    CVE-2021-3612 | CVE-2021-22543 |
    Software Advisories
    Advisory ID Software Component Link
    USN-5071-3 Ubuntu Linux URL Logo ubuntu.com/security/notices/USN-5071-3
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