Out-of-bounds read in Linux kernel - CVE-2021-47390
Published: May 31, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90300
CSH Severity: Low
CVSSv4.0: 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/E:U/U:Clear
CVE-ID: CVE-2021-47390
CWE-ID: CWE-125
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
Linux kernel
Linux kernel
Software vendor:
Linux Foundation
Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the ioapic_write_indirect() function in arch/x86/kvm/ioapic.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
External links
- https://git.kernel.org/stable/c/bebabb76ad9acca8858e0371e102fb60d708e25b
- https://git.kernel.org/stable/c/99a9e9b80f19fc63be005a33d76211dd23114792
- https://git.kernel.org/stable/c/2f9b68f57c6278c322793a06063181deded0ad69
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.71
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14.10
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15