github - ghsa-2prc-4f47-p38v

GHSA-2PRC-4F47-P38V

Vulnerability from github – Published: 2024-02-27 21:31 – Updated: 2024-12-06 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

vhost-vdpa: fix vm_flags for virtqueue doorbell mapping

The virtqueue doorbell is usually implemented via registeres but we don't provide the necessary vma->flags like VM_PFNMAP. This may cause several issues e.g when userspace tries to map the doorbell via vhost IOTLB, kernel may panic due to the page is not backed by page structure. This patch fixes this by setting the necessary vm_flags. With this patch, try to map doorbell via IOTLB will fail with bad address.

Severity ?

5.5 (Medium)


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

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  "affected": [],
  "aliases": [
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    "github_reviewed": false,
    "github_reviewed_at": null,
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    "severity": "MODERATE"
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  "id": "GHSA-2prc-4f47-p38v",
  "modified": "2024-12-06T18:30:44Z",
  "published": "2024-02-27T21:31:27Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46967"
    },
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      "type": "CVSS_V3"
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}

CVE-2021-46967 (GCVE-0-2021-46967)

Vulnerability from cvelistv5 – Published: 2024-02-27 18:47 – Updated: 2025-05-04 07:01

Summary

In the Linux kernel, the following vulnerability has been resolved: vhost-vdpa: fix vm_flags for virtqueue doorbell mapping The virtqueue doorbell is usually implemented via registeres but we don't provide the necessary vma->flags like VM_PFNMAP. This may cause several issues e.g when userspace tries to map the doorbell via vhost IOTLB, kernel may panic due to the page is not backed by page structure. This patch fixes this by setting the necessary vm_flags. With this patch, try to map doorbell via IOTLB will fail with bad address.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/3b8b6399666a29daa…
	https://git.kernel.org/stable/c/940230a5c31e27147…
	https://git.kernel.org/stable/c/93dbbf20e3ffad14f…
	https://git.kernel.org/stable/c/3a3e0fad16d40a2aa…

Impacted products

Vendor

Product

Version

Linux

Affected: ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 , < 3b8b6399666a29daa30b0bb3f5c9e3fc81c5a6a6 (git)
Affected: ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 , < 940230a5c31e2714722aee04c521a21f484b4df7 (git)
Affected: ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 , < 93dbbf20e3ffad14f04227a0b7105f6e6f0387ce (git)
Affected: ddd89d0a059d8e9740c75a97e0efe9bf07ee51f9 , < 3a3e0fad16d40a2aa68ddf7eea4acdf48b22dd44 (git)

Linux

Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 5.10.36 , ≤ 5.10.* (semver)
Unaffected: 5.11.20 , ≤ 5.11.* (semver)
Unaffected: 5.12.3 , ≤ 5.12.* (semver)
Unaffected: 5.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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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-2PRC-4F47-P38V

CVE-2021-46967 (GCVE-0-2021-46967)

Tags

Sightings

Nomenclature