QID 352869

Date Published: 2021-11-10

QID 352869: Amazon Linux Security Advisory for kernel: ALAS2-2021-1719

A flaw was found in the linux kernel.
A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c.
This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running osp.
The highest threat from this vulnerability is system availability.
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.

Allows unauthorized disclosure of information; allows unauthorized modification; allows disruption of service.

  • CVSS V3 rated as High - 7.8 severity.
  • CVSS V2 rated as High - 7.2 severity.
  • Solution
    Please refer to Amazon advisory: ALAS2-2021-1719 for affected packages and patching details, or update with your package manager.
    Vendor References
    Software Advisories
    Advisory ID Software Component Link
    ALAS2-2021-1719 Amazon Linux 2 URL Logo alas.aws.amazon.com/AL2/ALAS-2021-1719.html