CVE-2022-49610 Details
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: VMX: Prevent RSB underflow before vmenter On VMX, there are some balanced returns between the time the guest's SPEC_CTRL value is written, and the vmenter. Balanced returns (matched by a preceding call) are usually ok, but it's at least theoretically possible an NMI with a deep call stack could empty the RSB before one of the returns. For maximum paranoia, don't allow *any* returns (balanced or otherwise) between the SPEC_CTRL write and the vmenter. [ bp: Fix 32-bit build. ]
A vulnerability in the Linux kernel's KVM VMX implementation has been addressed, which relates to the Return Stack Buffer (RSB) management during virtual machine transitions. The issue arose because balanced return calls could theoretically be interrupted by a Non-Maskable Interrupt (NMI), potentially causing an RSB underflow before the virtual machine entry (vmenter) process. To mitigate this risk, the vulnerability prevents any return actions, whether balanced or not, between the SPEC_CTRL write and the vmenter, ensuring a more secure transition process.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/07853adc29a058c5fd143c14e5ac528448a72ed9 | kernel.org | Patch |
| https://git.kernel.org/stable/c/afd743f6dde87296c6f3414706964c491bb85862 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | < 5.18.14 5.19 rc1 5.19 rc2 5.19 rc3 5.19 rc4 5.19 rc5 5.19 rc6 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Oct 23, 2025 | Initial Analysis | [email protected] |
| Feb 26, 2025 | New CVE Received | kernel.org |