QID 198543

Date Published: 2021-10-29

QID 198543: Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-5117-1)

The btrfs file system in the linux kernel did not properly handle removing a non-existent device id.
The qualcomm ipc router protocol implementation in the linux kernel did not properly validate metadata in some situations.
The virtual terminal (vt) device implementation in the linux kernel contained a race condition in its ioctl handling that led to an out-of-bounds read vulnerability.
The linux kernel did not properly account for the memory usage of certain ipc objects.

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 with cap_sys_admin could use this to cause a denial of service. (
Cve-2021-3739).
A local attacker could use this to cause a denial of service (system crash) or expose sensitive information. (
Cve-2021-3743).
A local attacker could possibly use this to expose sensitive information. (
Cve-2021-3753).
A local attacker could use this to cause a denial of service (memory exhaustion) (cve-2021-3759).

  • CVSS V3 rated as Medium - 4.2 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Refer to Ubuntu advisory: USN-5117-1 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 198543

    CVE-2021-3743 | CVE-2021-3759 | CVE-2021-3739 | CVE-2021-3753 |
    Software Advisories
    Advisory ID Software Component Link
    USN-5117-1 Ubuntu Linux URL Logo ubuntu.com/security/notices/USN-5117-1
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