CVSS 7.8 · High EPSS 0,30%
Kerentanan Double Free pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: uio: Fix use-after-free in uio_open core-1 core-2 ------------------------------------------------------- uio_unregister_device uio_open idev = idr_find() device_unregister(&idev->dev) put_device(&idev->dev) uio_device_release get_device(&idev->dev) kfree(idev) uio_free_minor(minor) uio_release put_device(&idev->dev) kfree(idev) ------------------------------------------------------- In the core-1 uio_unregister_device(), the device_unregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 device_unregister, put_device and before doing kfree, the core-2 may get_device. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uio_release and put_device, the idev will be double freed. To address this issue, we can get idev atomic & inc idev reference with minor_lock.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi sesudah 4.18.0 hingga sebelum 4.19.306 |
| linux | linux kernel | Versi 4.20.0 hingga sebelum 5.4.268 |
| linux | linux kernel | Versi 5.5.0 hingga sebelum 5.10.209 |
| linux | linux kernel | Versi 5.11.0 hingga sebelum 5.15.148 |
| linux | linux kernel | Versi 5.16.0 hingga sebelum 6.1.74 |
| linux | linux kernel | Versi 6.2.0 hingga sebelum 6.6.13 |
| linux | linux kernel | Versi 6.7.0 hingga sebelum 6.7.1 |
| linux | linux kernel | Versi 4.18 |
| linux | linux kernel | Versi 4.18 rc5 |
| linux | linux kernel | Versi 4.18 rc6 |
| linux | linux kernel | Versi 4.18 rc7 |
| linux | linux kernel | Versi 4.18 rc8 |