github - ghsa-3p2v-4qj8-6w5f

GHSA-3P2V-4QJ8-6W5F

Vulnerability from github – Published: 2024-05-21 15:31 – Updated: 2025-03-06 15:34

Details

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

media: v4l2-core: explicitly clear ioctl input data

As seen from a recent syzbot bug report, mistakes in the compat ioctl implementation can lead to uninitialized kernel stack data getting used as input for driver ioctl handlers.

The reported bug is now fixed, but it's possible that other related bugs are still present or get added in the future. As the drivers need to check user input already, the possible impact is fairly low, but it might still cause an information leak.

To be on the safe side, always clear the entire ioctl buffer before calling the conversion handler functions that are meant to initialize them.

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": [
    "CVE-2021-47339"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-908"
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    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-21T15:15:20Z",
    "severity": "MODERATE"
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  "id": "GHSA-3p2v-4qj8-6w5f",
  "modified": "2025-03-06T15:34:35Z",
  "published": "2024-05-21T15:31:43Z",
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}

CVE-2021-47339 (GCVE-0-2021-47339)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:35 – Updated: 2025-05-04 07:08

Summary

In the Linux kernel, the following vulnerability has been resolved: media: v4l2-core: explicitly clear ioctl input data As seen from a recent syzbot bug report, mistakes in the compat ioctl implementation can lead to uninitialized kernel stack data getting used as input for driver ioctl handlers. The reported bug is now fixed, but it's possible that other related bugs are still present or get added in the future. As the drivers need to check user input already, the possible impact is fairly low, but it might still cause an information leak. To be on the safe side, always clear the entire ioctl buffer before calling the conversion handler functions that are meant to initialize them.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/dc02c0b2bd6096f2f…
	https://git.kernel.org/stable/c/bfb48b54db25c3b4e…
	https://git.kernel.org/stable/c/7b53cca764f9b291b…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < dc02c0b2bd6096f2f3ce63e1fc317aeda05f74d8 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bfb48b54db25c3b4ef4bef5e0691464ebc4aa335 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7b53cca764f9b291b7907fcd39d9e66ad728ee0b (git)

Linux

Unaffected: 5.12.18 , ≤ 5.12.* (semver)
Unaffected: 5.13.3 , ≤ 5.13.* (semver)
Unaffected: 5.14 , ≤ * (original_commit_for_fix)

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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-3P2V-4QJ8-6W5F

CVE-2021-47339 (GCVE-0-2021-47339)

Tags

Sightings

Nomenclature