SB20240620118 - Incorrect calculation of buffer size in Linux kernel asm xen
Published: June 20, 2024
Security Bulletin ID
SB20240620118
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) Incorrect calculation of buffer size (CVE-ID: CVE-2021-28039)
CWE-ID: CWE-131 - Incorrect Calculation of Buffer Size
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 a crash the entire system.
The vulnerability exists due to incorrect calculation of buffer size error within the __aligned() and xen_memory_setup() functions in arch/x86/xen/setup.c, within the xen_vmalloc_p2m_tree() and __set_phys_to_machine() functions in arch/x86/xen/p2m.c. A local user can a crash the entire system.
Remediation
Install update from vendor's website.