# CVE-2021-47372: linux: In the Linux kernel, the following vulnerability has been resolved:  net: macb: fix use after free on rmmod  plat_dev...

CVE-2021-47372 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47372, released May 21, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-47372
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0024
- 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:  net: macb: fix use after free on rmmod  plat_dev->dev->platform_data is released by platform_device_unregister(), use of pclk and hclk is a use-after-free. Since device unregister won't need a clk device we adjust the function call sequence to fix this issue.  [   31.261225] BUG: KASAN: use-after-free in macb_remove+0x77/0xc6 [macb_pci] [   31.275563] Freed by task 306: [   30.276782]  platform_device_release+0x25/0x80

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.9-1 | [DEBIAN-CVE-2021-47372](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47372.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.9-1 | [DEBIAN-CVE-2021-47372](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47372.md) | May 21, 2024 |
| Linux | linux Debian 14 | 5.14.9-1 | [DEBIAN-CVE-2021-47372](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47372.md) | May 21, 2024 |

---

Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.