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.

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Linux
  • Linux Kernel

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*

No data.

References
Link Providers
https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575 cve-icon cve-icon
https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7 cve-icon cve-icon
https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426 cve-icon cve-icon
https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0 cve-icon cve-icon
https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d cve-icon cve-icon
https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7 cve-icon cve-icon
https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c cve-icon cve-icon
https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024052149-CVE-2021-47401-10e4@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-47401 cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-47401 cve-icon
History

Fri, 26 Sep 2025 19:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H'}

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

Fri, 19 Sep 2025 14:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-668
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N'}

 cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H'}

Mon, 04 Nov 2024 12:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2024-05-21T15:03:56.024Z

Updated: 2025-05-04T07:10:12.360Z

Reserved: 2024-05-21T14:58:30.816Z

Link: CVE-2021-47401

cve-icon Vulnrichment

Updated: 2024-08-04T05:39:59.319Z

cve-icon NVD

Status : Analyzed

Published: 2024-05-21T15:15:25.563

Modified: 2025-09-26T19:03:45.330

Link: CVE-2021-47401

cve-icon Redhat

Severity : Low

Publid Date: 2024-05-21T00:00:00Z

Links: CVE-2021-47401 - Bugzilla