# CVE-2022-49711: linux: In the Linux kernel, the following vulnerability has been resolved:  bus: fsl-mc-bus: fix KASAN use-after-free in fsl...

CVE-2022-49711 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49711, released February 26, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-49711
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Feb 26, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  bus: fsl-mc-bus: fix KASAN use-after-free in fsl_mc_bus_remove()  In fsl_mc_bus_remove(), mc->root_mc_bus_dev->mc_io is passed to fsl_destroy_mc_io(). However, mc->root_mc_bus_dev is already freed in fsl_mc_device_remove(). Then reference to mc->root_mc_bus_dev->mc_io triggers KASAN use-after-free. To avoid the use-after-free, keep the reference to mc->root_mc_bus_dev->mc_io in a local variable and pass to fsl_destroy_mc_io().  This patch needs rework to apply to kernels older than v5.15.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.18.14-1 | [DEBIAN-CVE-2022-49711](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49711.md) | Feb 26, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.18.14-1 | [DEBIAN-CVE-2022-49711](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49711.md) | Feb 26, 2025 |
| Linux | linux Debian 14 | 5.18.14-1 | [DEBIAN-CVE-2022-49711](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49711.md) | Feb 26, 2025 |

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