# CVE-2021-47058: linux: In the Linux kernel, the following vulnerability has been resolved:  regmap: set debugfs_name to NULL after it is fre...

CVE-2021-47058 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47058, released February 29, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-47058
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 29, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  regmap: set debugfs_name to NULL after it is freed  There is a upstream commit cffa4b2122f5("regmap:debugfs: Fix a memory leak when calling regmap_attach_dev") that adds a if condition when create name for debugfs_name. With below function invoking logical, debugfs_name is freed in regmap_debugfs_exit(), but it is not created again because of the if condition introduced by above commit. regmap_reinit_cache() 	regmap_debugfs_exit() 	... 	regmap_debugfs_init() So, set debugfs_name to NULL after it is freed.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.10.38-1 | [DEBIAN-CVE-2021-47058](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47058.md) | Feb 29, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.10.38-1 | [DEBIAN-CVE-2021-47058](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47058.md) | Feb 29, 2024 |
| Linux | linux Debian 14 | 5.10.38-1 | [DEBIAN-CVE-2021-47058](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47058.md) | Feb 29, 2024 |

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