Vulnerability-Lookup

GHSA-R6C5-M6XC-3746

Vulnerability from github – Published: 2023-01-09 12:30 – Updated: 2025-02-13 18:31

Details

A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesn't need retpolines or IBPB after running L2 due to KVM (L0) advertising eIBRS support to L1. An attacker at L2 with code execution can execute code on an indirect branch on the host machine. We recommend upgrading to Kernel 6.2 or past commit 2e7eab81425a

Severity ?

8.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-2196"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1188"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-01-09T11:15:00Z",
    "severity": "HIGH"
  },
  "details": "A regression exists in the Linux Kernel within KVM: nVMX that allowed for speculative execution attacks. L2 can carry out Spectre v2 attacks on L1 due to L1 thinking it doesn\u0027t need retpolines or IBPB after running L2 due to KVM (L0) advertising eIBRS support to L1. An attacker at L2 with code execution can execute code on an indirect branch on the host machine. We recommend upgrading to Kernel 6.2 or past commit 2e7eab81425a",
  "id": "GHSA-r6c5-m6xc-3746",
  "modified": "2025-02-13T18:31:21Z",
  "published": "2023-01-09T12:30:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-2196"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2e7eab81425ad6c875f2ed47c0ce01e78afc38a5"
    },
    {
      "type": "WEB",
      "url": "https://kernel.dance/#2e7eab81425a"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html"
    },
    {
      "type": "WEB",
      "url": "https://security.netapp.com/advisory/ntap-20230223-0002"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-2196 (GCVE-0-2022-2196)

Vulnerability from cvelistv5 – Published: 2023-01-09 10:59 – Updated: 2025-02-13 16:28

Title

Speculative execution attacks in KVM VMX

Summary

Severity ?

5.8 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L

CWE

CWE-1188 - Insecure Default Initialization of Resource

Assigner

Google

References

URL

Tags

	https://kernel.dance/#2e7eab81425a
	https://git.kernel.org/pub/scm/linux/kernel/git/t…
	https://lists.debian.org/debian-lts-announce/2023…

Impacted products

	Vendor	Product	Version
	Linux	Linux Kernel	Affected: 0 , < 2e7eab81425a (git) Affected: 0 , < 6.2 (custom)

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JSON

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          },
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-R6C5-M6XC-3746

CVE-2022-2196 (GCVE-0-2022-2196)

Tags

Sightings

Nomenclature