Vulnerability-Lookup

GHSA-C227-Q7J7-XF88

Vulnerability from github – Published: 2024-05-21 15:31 – Updated: 2025-09-19 15:31

Details

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

ipack: ipoctal: fix stack information leak

The tty driver name is used also after registering the driver and must specifically not be allocated on the stack to avoid leaking information to user space (or triggering an oops).

Drivers should not try to encode topology information in the tty device name but this one snuck in through staging without anyone noticing and another driver has since copied this malpractice.

Fixing the ABI is a separate issue, but this at least plugs the security hole.

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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  "aliases": [
    "CVE-2021-47401"
  ],
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    "cwe_ids": [
      "CWE-668"
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    "github_reviewed_at": null,
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  "modified": "2025-09-19T15:31:07Z",
  "published": "2024-05-21T15:31:44Z",
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CVE-2021-47401 (GCVE-0-2021-47401)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:03 – Updated: 2026-08-05 08:47

Title

ipack: ipoctal: fix stack information leak

Summary

In the Linux kernel, the following vulnerability has been resolved: ipack: ipoctal: fix stack information leak The tty driver name is used also after registering the driver and must specifically not be allocated on the stack to avoid leaking information to user space (or triggering an oops). Drivers should not try to encode topology information in the tty device name but this one snuck in through staging without anyone noticing and another driver has since copied this malpractice. Fixing the ABI is a separate issue, but this at least plugs the security hole.

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 2024-05-21 17:32 UTC

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/acb96e782bad427ca…
https://git.kernel.org/stable/c/741ea2670e021350e…
https://git.kernel.org/stable/c/2725925982dc96a78…
https://git.kernel.org/stable/c/829f13d6079cf7a24…
https://git.kernel.org/stable/c/8657158a3b68c8523…
https://git.kernel.org/stable/c/5f6a309a699675680…
https://git.kernel.org/stable/c/0a9c36a2e06a249ac…
https://git.kernel.org/stable/c/a89936cce87d60766…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < acb96e782bad427ca4bb1bd94af660acd1462380 (git) Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 741ea2670e021350e54f491106bdaa22dc50e6a0 (git) Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 2725925982dc96a78069cd118ea3d66759bfdad7 (git) Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 829f13d6079cf7a2465522f39acb43033e9b320d (git) Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 8657158a3b68c85234e6da3d8eae33d6183588b7 (git) Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 5f6a309a699675680df15d9b6d389114515b4426 (git) Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < 0a9c36a2e06a249acbed64e8e0b84637c2ad7575 (git) Affected: ba4dc61fe8c545a5d6a68b63616776556b771f51 , < a89936cce87d60766a75732a9e7e25c51164f47c (git)
Linux	Linux	Affected: 3.5 Unaffected: 0 , < 3.5 (semver) Unaffected: 4.4.286 , ≤ 4.4.* (semver) Unaffected: 4.9.285 , ≤ 4.9.* (semver) Unaffected: 4.14.249 , ≤ 4.14.* (semver) Unaffected: 4.19.209 , ≤ 4.19.* (semver) Unaffected: 5.4.151 , ≤ 5.4.* (semver) Unaffected: 5.10.71 , ≤ 5.10.* (semver) Unaffected: 5.14.10 , ≤ 5.14.* (semver) Unaffected: 5.15 , ≤ * (original_commit_for_fix)

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JSON

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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.

Detection rules are retrieved from Rulezet.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.