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KVM: VMX: Prevent RSB underflow before vmenter

Type: advisorySources: OSV

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. ]

Products
Kernel
Affected versions
Not specified
Fixed versions
5.18.14
CVEs
CVE-2022-49610
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 18:42 UTC · Revision 1

Source evidence

KVM: VMX: Prevent RSB underflow before vmenter

core-osv · Original source

Published 26 Feb 2025, 02:23 UTC

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. ]

osv:CVE-2022-49610

Kernel

Fixed versions: 5.18.14

Complete source record
{
  "id": "3cdd26fc84853e9cec24d82218f24fe8e3f66de0e106b2eaa4b4e37dafda3693",
  "url": "https://osv.dev/vulnerability/CVE-2022-49610",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "KVM: VMX: Prevent RSB underflow before vmenter",
    "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. ]",
    "evidence": "osv:CVE-2022-49610",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2022-49610",
      "aliases": [
        "CVE-2022-49610"
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49610.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
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                {
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              ]
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49610.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.423115657Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/07853adc29a058c5fd143c14e5ac528448a72ed9",
        "https://git.kernel.org/stable/c/afd743f6dde87296c6f3414706964c491bb85862",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49610.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2022-49610",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49610.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2022-49610",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 520120,
  "published_at": "2025-02-26T02:23:33.299+00:00"
}