# CVE-2021-47401: linux: In the Linux kernel, the following vulnerability has been resolved:  ipack: ipoctal: fix stack information leak  The...

CVE-2021-47401 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47401, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-47401
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.12-1 | [DEBIAN-CVE-2021-47401](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47401.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.12-1 | [DEBIAN-CVE-2021-47401](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47401.md) | May 21, 2024 |
| Linux | linux Debian 14 | 5.14.12-1 | [DEBIAN-CVE-2021-47401](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47401.md) | May 21, 2024 |

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