# CVE-2021-46994: linux: In the Linux kernel, the following vulnerability has been resolved:  can: mcp251x: fix resume from sleep before inter...

CVE-2021-46994 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-46994, released February 28, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-46994
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 28, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  can: mcp251x: fix resume from sleep before interface was brought up  Since 8ce8c0abcba3 the driver queues work via priv->restart_work when resuming after suspend, even when the interface was not previously enabled. This causes a null dereference error as the workqueue is only allocated and initialized in mcp251x_open().  To fix this we move the workqueue init to mcp251x_can_probe() as there is no reason to do it later and repeat it whenever mcp251x_open() is called.  [mkl: fix error handling in mcp251x_stop()]

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.10.38-1 | [DEBIAN-CVE-2021-46994](https://patchblox.com/security/data/fix/linux/debian-cve-2021-46994.md) | Feb 28, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.10.38-1 | [DEBIAN-CVE-2021-46994](https://patchblox.com/security/data/fix/linux/debian-cve-2021-46994.md) | Feb 28, 2024 |
| Linux | linux Debian 14 | 5.10.38-1 | [DEBIAN-CVE-2021-46994](https://patchblox.com/security/data/fix/linux/debian-cve-2021-46994.md) | Feb 28, 2024 |

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