Vulnerability-Lookup

GHSA-5583-QMCH-62X6

Vulnerability from github – Published: 2024-06-19 15:30 – Updated: 2024-08-27 18:31

Details

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

vduse: check that offset is within bounds in get_config()

This condition checks "len" but it does not check "offset" and that could result in an out of bounds read if "offset > dev->config_size". The problem is that since both variables are unsigned the "dev->config_size - offset" subtraction would result in a very high unsigned value.

I think these checks might not be necessary because "len" and "offset" are supposed to already have been validated using the vhost_vdpa_config_validate() function. But I do not know the code perfectly, and I like to be safe.

Severity

7.1 (High)


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

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  "affected": [],
  "aliases": [
    "CVE-2021-47604"
  ],
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    "cwe_ids": [
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  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvduse: check that offset is within bounds in get_config()\n\nThis condition checks \"len\" but it does not check \"offset\" and that\ncould result in an out of bounds read if \"offset \u003e dev-\u003econfig_size\".\nThe problem is that since both variables are unsigned the\n\"dev-\u003econfig_size - offset\" subtraction would result in a very high\nunsigned value.\n\nI think these checks might not be necessary because \"len\" and \"offset\"\nare supposed to already have been validated using the\nvhost_vdpa_config_validate() function.  But I do not know the code\nperfectly, and I like to be safe.",
  "id": "GHSA-5583-qmch-62x6",
  "modified": "2024-08-27T18:31:35Z",
  "published": "2024-06-19T15:30:55Z",
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47604"
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}

CVE-2021-47604 (GCVE-0-2021-47604)

Vulnerability from cvelistv5 – Published: 2024-06-19 14:54 – Updated: 2026-08-05 08:48

Title

vduse: check that offset is within bounds in get_config()

Summary

In the Linux kernel, the following vulnerability has been resolved: vduse: check that offset is within bounds in get_config() This condition checks "len" but it does not check "offset" and that could result in an out of bounds read if "offset > dev->config_size". The problem is that since both variables are unsigned the "dev->config_size - offset" subtraction would result in a very high unsigned value. I think these checks might not be necessary because "len" and "offset" are supposed to already have been validated using the vhost_vdpa_config_validate() function. But I do not know the code perfectly, and I like to be safe.

Severity

7.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 17:12 UTC

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/ebbbc5fea3f648175…
https://git.kernel.org/stable/c/dc1db0060c02d119f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c8a6153b6c59d95c0e091f053f6f180952ade91e , < ebbbc5fea3f648175df1aa3f127c78eb0252cc2a (git) Affected: c8a6153b6c59d95c0e091f053f6f180952ade91e , < dc1db0060c02d119fd4196924eff2d1129e9a442 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.11 , ≤ 5.15.* (semver) Unaffected: 5.16 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-5583-QMCH-62X6

CVE-2021-47604 (GCVE-0-2021-47604)

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