SB2024050839 - Privilege escalation in Linux kernel kvm
Published: May 8, 2024 Updated: May 14, 2025
Security Bulletin ID
SB2024050839
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Buffer overflow (CVE-ID: CVE-2021-47112)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the Teardown PV features implementation in arch/x86/kernel/kvm.c. A local user can trigger memory corruption and escalate privileges on the system.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/7620a669111b52f224d006dea9e1e688e2d62c54
- https://git.kernel.org/stable/c/38b858da1c58ad46519a257764e059e663b59ff2
- https://git.kernel.org/stable/c/d1629b5b925de9b27979e929dae7fcb766daf6b6
- https://git.kernel.org/stable/c/8b79feffeca28c5459458fe78676b081e87c93a4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.43
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.125