CVE-2022-48793

MEDIUM EPSS 14.8%
Published Jul 16, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 16, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: x86: nSVM: fix potential NULL derefernce on nested migration Turns out that due to review feedback and/or rebases I accidentally moved the call to nested_svm_load_cr3 to be too early, before the NPT is enabled, which is very wrong to do. KVM can't even access guest memory at that point as nested NPT is needed for that, and of course it won't initialize the walk_mmu, which is main issue the patch was addressing. Fix this for real.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
14.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 2

VendorProductVersionRange
linuxlinux_kernel*≥5.13  –  <5.15.25
linuxlinux_kernel*≥5.16  –  <5.16.11

References 3

  • git.kernel.org https://git.kernel.org/stable/c/352193edda48e08e8824a7ece09aec830a603cfe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/74b426bea4f7e3b081add2b88d4fba16d3af7ab6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1779c2714c3023e4629825762bcbc43a3b943df
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/352193edda48e08e8824a7ece09aec830a603cfe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/74b426bea4f7e3b081add2b88d4fba16d3af7ab6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1779c2714c3023e4629825762bcbc43a3b943df
    Patch