github - ghsa-2mfj-vmvj-q937

ghsa-2mfj-vmvj-q937

Vulnerability from github

Published

2022-06-10 00:00

Modified

2022-06-22 00:00

Severity ?

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

Details

x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen's safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.

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{
  "affected": [],
  "aliases": [
    "CVE-2022-26362"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-06-09T17:15:00Z",
    "severity": "MODERATE"
  },
  "details": "x86 pv: Race condition in typeref acquisition Xen maintains a type reference count for pages, in addition to a regular reference count. This scheme is used to maintain invariants required for Xen\u0027s safety, e.g. PV guests may not have direct writeable access to pagetables; updates need auditing by Xen. Unfortunately, the logic for acquiring a type reference has a race condition, whereby a safely TLB flush is issued too early and creates a window where the guest can re-establish the read/write mapping before writeability is prohibited.",
  "id": "GHSA-2mfj-vmvj-q937",
  "modified": "2022-06-22T00:00:57Z",
  "published": "2022-06-10T00:00:55Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-26362"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q"
    },
    {
      "type": "WEB",
      "url": "https://security.gentoo.org/glsa/202208-23"
    },
    {
      "type": "WEB",
      "url": "https://www.debian.org/security/2022/dsa-5184"
    },
    {
      "type": "WEB",
      "url": "https://xenbits.xenproject.org/xsa/advisory-401.txt"
    },
    {
      "type": "WEB",
      "url": "http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2022/06/09/3"
    },
    {
      "type": "WEB",
      "url": "http://xenbits.xen.org/xsa/advisory-401.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

cve-2022-26362

Vulnerability from cvelistv5

Published

2022-06-09 12:50

Modified

2024-08-03 05:03

Severity ?

Summary

References

▼	URL	Tags
	https://xenbits.xenproject.org/xsa/advisory-401.txt	x_refsource_MISC
	http://xenbits.xen.org/xsa/advisory-401.html	x_refsource_CONFIRM
	http://www.openwall.com/lists/oss-security/2022/06/09/3	mailing-list, x_refsource_MLIST
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OH65U6FTTB5MLH5A6Q3TW7KVCGOG4MYI/	vendor-advisory, x_refsource_FEDORA
	http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html	x_refsource_MISC
	https://www.debian.org/security/2022/dsa-5184	vendor-advisory, x_refsource_DEBIAN
	https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/	vendor-advisory, x_refsource_FEDORA
	https://security.gentoo.org/glsa/202208-23	vendor-advisory, x_refsource_GENTOO

Impacted products

▼	Vendor	Product
	Xen	xen

Show details on NVD website

JSON

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{
  "containers": {
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          "dateUpdated": "2024-08-03T05:03:32.792Z",
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          },
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          },
          {
            "name": "[oss-security] 20220609 Xen Security Advisory 401 v2 (CVE-2022-26362) - x86 pv: Race condition in typeref acquisition",
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          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html"
          },
          {
            "name": "DSA-5184",
            "tags": [
              "vendor-advisory",
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          },
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            "name": "GLSA-202208-23",
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            "url": "https://security.gentoo.org/glsa/202208-23"
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      ],
      "metrics": [
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      "problemTypes": [
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        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html"
        },
        {
          "name": "DSA-5184",
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          ],
          "url": "https://www.debian.org/security/2022/dsa-5184"
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          "name": "FEDORA-2022-2c9f8224f8",
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        },
        {
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          ],
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          "ID": "CVE-2022-26362",
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                          {
                            "version_affected": "?",
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                  ]
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        "configuration": {
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                }
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              "url": "http://packetstormsecurity.com/files/167718/Xen-TLB-Flush-Bypass.html"
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              "refsource": "FEDORA",
              "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKRXZ4LHGCGMOG24ZCEJNY6R2BTS4S2Q/"
            },
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        "workaround": {
          "workaround_data": {
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              "description_data": [
                {
                  "lang": "eng",
                  "value": "Not running x86 PV guests will avoid the vulnerability."
                }
              ]
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  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2022-26362",
    "datePublished": "2022-06-09T12:50:19",
    "dateReserved": "2022-03-02T00:00:00",
    "dateUpdated": "2024-08-03T05:03:32.792Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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