github - ghsa-qv7j-3q84-2q98

ghsa-qv7j-3q84-2q98

Vulnerability from github

Published

2022-05-24 17:22

Modified

2022-05-24 17:22

Details

A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that host has 'TSX' enabled. Confidentiality of data is the highest threat associated with this vulnerability.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-19338"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-07-13T17:15:00Z",
    "severity": "LOW"
  },
  "details": "A flaw was found in the fix for CVE-2019-11135, in the Linux upstream kernel versions before 5.5 where, the way Intel CPUs handle speculative execution of instructions when a TSX Asynchronous Abort (TAA) error occurs. When a guest is running on a host CPU affected by the TAA flaw (TAA_NO=0), but is not affected by the MDS issue (MDS_NO=1), the guest was to clear the affected buffers by using a VERW instruction mechanism. But when the MDS_NO=1 bit was exported to the guests, the guests did not use the VERW mechanism to clear the affected buffers. This issue affects guests running on Cascade Lake CPUs and requires that host has \u0027TSX\u0027 enabled. Confidentiality of data is the highest threat associated with this vulnerability.",
  "id": "GHSA-qv7j-3q84-2q98",
  "modified": "2022-05-24T17:22:46Z",
  "published": "2022-05-24T17:22:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19338"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338"
    },
    {
      "type": "WEB",
      "url": "https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort"
    },
    {
      "type": "WEB",
      "url": "https://www.openwall.com/lists/oss-security/2019/12/10/3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

cve-2019-19338

Vulnerability from cvelistv5

Published

2020-07-13 16:04

Modified

2024-08-05 02:16

Severity ?

5.5 (Medium) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Summary

References

▼	URL	Tags
	https://www.openwall.com/lists/oss-security/2019/12/10/3	x_refsource_MISC
	https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19338	x_refsource_CONFIRM
	https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort	x_refsource_MISC

Impacted products

Vendor

Product

Version

▼

[UNKNOWN]

Linux Kernel

Version: before 5.5

Show details on NVD website

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            "url": "https://software.intel.com/security-software-guidance/insights/deep-dive-intel-transactional-synchronization-extensions-intel-tsx-asynchronous-abort"
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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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