CVE-2022-49610 (GCVE-0-2022-49610)
Vulnerability from cvelistv5
Published
2025-02-26 02:23
Modified
2025-05-04 08:41
Severity ?
VLAI Severity ?
EPSS score ?
Summary
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
Impacted products
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"containers": {
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"programFiles": [
"arch/x86/kernel/asm-offsets.c",
"arch/x86/kernel/cpu/bugs.c",
"arch/x86/kvm/vmx/capabilities.h",
"arch/x86/kvm/vmx/vmenter.S",
"arch/x86/kvm/vmx/vmx.c",
"arch/x86/kvm/vmx/vmx.h",
"arch/x86/kvm/vmx/vmx_ops.h"
],
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"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
"versionType": "git"
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{
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}
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"arch/x86/kvm/vmx/vmenter.S",
"arch/x86/kvm/vmx/vmx.c",
"arch/x86/kvm/vmx/vmx.h",
"arch/x86/kvm/vmx/vmx_ops.h"
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
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{
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"status": "unaffected",
"version": "5.19",
"versionType": "original_commit_for_fix"
}
]
}
],
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: VMX: Prevent RSB underflow before vmenter\n\nOn VMX, there are some balanced returns between the time the guest\u0027s\nSPEC_CTRL value is written, and the vmenter.\n\nBalanced returns (matched by a preceding call) are usually ok, but it\u0027s\nat least theoretically possible an NMI with a deep call stack could\nempty the RSB before one of the returns.\n\nFor maximum paranoia, don\u0027t allow *any* returns (balanced or otherwise)\nbetween the SPEC_CTRL write and the vmenter.\n\n [ bp: Fix 32-bit build. ]"
}
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"title": "KVM: VMX: Prevent RSB underflow before vmenter",
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"datePublished": "2025-02-26T02:23:33.299Z",
"dateReserved": "2025-02-26T02:21:30.417Z",
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