PT-2025-18798 · Linux+1 · Linux Kernel+1

Published 2022-11-11 · Updated 2026-04-20 · CVE-2022-49933

Positive Technologies (AI Summary)

CVSS v2.0

4.3

Medium

Base vector

AV:A/AC:H/Au:S/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A vulnerability in the Linux kernel has been resolved, related to KVM (Kernel-based Virtual Machine) and VMX (Virtual Machine Extensions). The issue involves resetting eVMCS controls in the per-CPU VP assist page during hardware disabling. This reset is necessary to prevent a potential NULL pointer dereference bug when KVM disables CPU hotplug while enabling and disabling hardware. The controls are only activated if KVM creates a VM. The fix involves resetting the eVMCS controls during hardware disabling instead of waiting until the kvm-intel module exit.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2025-05368

CVE-2022-49933

Affected Products

Debian

Linux Kernel

References · 15

• https://cve.org/CVERecord?id=CVE-2022-49933 · Security Note
• https://bdu.fstec.ru/vul/2025-05368 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-49933 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49933 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-49933 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49933 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-49933 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2022-49933 · Vendor Advisory
• https://git.kernel.org/stable/c/afb26bfc01db6ef4728e96314f08431934ffe833 · Note
• https://git.kernel.org/stable/c/2916b70fc342719f570640de07251b7f91feebdb · Note
• https://git.kernel.org/stable/c/01aa8e5704bac9fcd7401eb1a74a375fba594203 · Note
• https://access.redhat.com/security/cve/cve-2022-49933 · Note
• https://git.kernel.org/linus/2916b70fc342719f570640de07251b7f91feebdb · Note
• https://twitter.com/CVEnew/status/1918568474781335980 · Twitter Post
• https://vuldb.com/?id.307209 · Note