CVE-2022-49610

medium

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. ]

References

https://git.kernel.org/stable/c/afd743f6dde87296c6f3414706964c491bb85862

https://git.kernel.org/stable/c/07853adc29a058c5fd143c14e5ac528448a72ed9

Details

Source: Mitre, NVD

Published: 2025-02-26

Updated: 2025-02-26

Risk Information

CVSS v2

Base Score: 3.5

Vector: CVSS2#AV:L/AC:H/Au:S/C:P/I:P/A:P

Severity: Low

CVSS v3

Base Score: 5.3

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L

Severity: Medium