SB2021040728 - Denial of service in Linux kernel
Published: April 7, 2021 Updated: March 13, 2022
Security Bulletin ID
SB2021040728
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Infinite loop (CVE-ID: CVE-2020-36310)
CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop in set_memory_region_test in arch/x86/kvm/svm/svm.c. A local user can consume all available system resources and cause denial of service conditions.
Remediation
Install update from vendor's website.