vulnerability
CentOS Linux: CVE-2018-18021: Important: kernel-alt security and bug fix update (CESA-2018:3656)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 4 | (AV:L/AC:L/Au:N/C:N/I:P/A:P) | Oct 7, 2018 | Aug 28, 2019 | May 25, 2023 |
Severity
4
CVSS
(AV:L/AC:L/Au:N/C:N/I:P/A:P)
Published
Oct 7, 2018
Added
Aug 28, 2019
Modified
May 25, 2023
Description
arch/arm64/kvm/guest.c in KVM in the Linux kernel before 4.18.12 on the arm64 platform mishandles the KVM_SET_ON_REG ioctl. This is exploitable by attackers who can create virtual machines. An attacker can arbitrarily redirect the hypervisor flow of control (with full register control). An attacker can also cause a denial of service (hypervisor panic) via an illegal exception return. This occurs because of insufficient restrictions on userspace access to the core register file, and because PSTATE.M validation does not prevent unintended execution modes.
Solution
centos-upgrade-kernel
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