Vulnerability CVE-2021-47401
Published: 2024-05-21

Description:
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.

 References:
https://git.kernel.org/stable/c/acb96e782bad427ca4bb1bd94af660acd1462380
https://git.kernel.org/stable/c/741ea2670e021350e54f491106bdaa22dc50e6a0
https://git.kernel.org/stable/c/2725925982dc96a78069cd118ea3d66759bfdad7
https://git.kernel.org/stable/c/829f13d6079cf7a2465522f39acb43033e9b320d
https://git.kernel.org/stable/c/8657158a3b68c85234e6da3d8eae33d6183588b7
https://git.kernel.org/stable/c/5f6a309a699675680df15d9b6d389114515b4426
https://git.kernel.org/stable/c/0a9c36a2e06a249acbed64e8e0b84637c2ad7575
https://git.kernel.org/stable/c/a89936cce87d60766a75732a9e7e25c51164f47c
Copyright 2026, cxsecurity.com

 

Back to Top