PT-2025-18797 · Linux+1 · Linux Kernel+1

Published 2022-12-29 · Updated 2026-04-20 · CVE-2022-49932

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.0.0-rc7+

Description A NULL pointer dereference bug has been identified in the Linux kernel, specifically in the KVM (Kernel-based Virtual Machine) module. The issue arises when the kvm init() function is called before all setup is complete, allowing userspace to create VMs and potentially leading to a NULL pointer dereference. This can occur when userspace is able to create a VM before vmx init() configures the per-CPU loaded vmcss on cpu list. The bug can cause a kernel crash, with symptoms including a supervisor write access in kernel mode and a not-present page error.

Recommendations For Linux kernel versions prior to 6.0.0-rc7+, update to a version that includes the fix for this issue. As a temporary workaround, consider disabling the kvm init() function until a patch is available. Restrict access to the /dev/kvm device file to minimize the risk of exploitation.

Exploit

Fix

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

AZL-70117

BDU:2026-02344

CVE-2022-49932

Affected Products

Debian

Linux Kernel

References · 21

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49932.json · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49932 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49932 · Vendor Advisory
• https://git.kernel.org/stable/c/e28533c08023c4b319b7f2cd77f3f7c9204eb517 · Patch
• https://ubuntu.com/security/CVE-2022-49932 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49932 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2022-49932 · Vendor Advisory
• https://git.kernel.org/stable/c/e136e969d268b9b89329c816c002e53f60e82985 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-49932 · Security Note
• https://git.kernel.org/stable/c/e32b120071ea114efc0b4ddd439547750b85f618 · Patch
• https://osv.dev/vulnerability/AZL-70117 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-49932 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2022-49932 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49932 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-02344 · Security Note