github - ghsa-7f5q-x8vx-pfrp

ghsa-7f5q-x8vx-pfrp

Vulnerability from github

Published

2023-09-13 18:31

Modified

2024-04-04 07:39

Severity ?

5.3 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H

Details

A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the VMGEXIT handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (CONFIG_VMAP_STACK).

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{
  "affected": [],
  "aliases": [
    "CVE-2023-4155"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-367"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-09-13T17:15:10Z",
    "severity": "MODERATE"
  },
  "details": "A flaw was found in KVM AMD Secure Encrypted Virtualization (SEV) in the Linux kernel. A KVM guest using SEV-ES or SEV-SNP with multiple vCPUs can trigger a double fetch race condition vulnerability and invoke the `VMGEXIT` handler recursively. If an attacker manages to call the handler multiple times, they can trigger a stack overflow and cause a denial of service or potentially guest-to-host escape in kernel configurations without stack guard pages (`CONFIG_VMAP_STACK`).",
  "id": "GHSA-7f5q-x8vx-pfrp",
  "modified": "2024-04-04T07:39:29Z",
  "published": "2023-09-13T18:31:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-4155"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2023-4155"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2213802"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2023-4155

Vulnerability from cvelistv5

Published

2023-09-13 16:11

Modified

2024-08-02 07:17

Severity ?

5.3 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:H

Summary

Sev-es / sev-snp vmgexit double fetch vulnerability

References

▼	URL	Tags
	https://access.redhat.com/security/cve/CVE-2023-4155	vdb-entry, x_refsource_REDHAT
	https://bugzilla.redhat.com/show_bug.cgi?id=2213802	issue-tracking, x_refsource_REDHAT

Impacted products

▼	Vendor	Product
	n/a	kernel
	Red Hat	Red Hat Enterprise Linux 6
	Red Hat	Red Hat Enterprise Linux 7
	Red Hat	Red Hat Enterprise Linux 7
	Red Hat	Red Hat Enterprise Linux 8
	Red Hat	Red Hat Enterprise Linux 8
	Red Hat	Red Hat Enterprise Linux 9
	Red Hat	Red Hat Enterprise Linux 9
	Fedora	Fedora

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  "dataVersion": "5.1"
}

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