CVE-2021-47404: HID: betop: fix slab-out-of-bounds Write in betop_probe
First published: Tue May 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: HID: betop: fix slab-out-of-bounds Write in betop_probe Syzbot reported slab-out-of-bounds Write bug in hid-betopff driver. The problem is the driver assumes the device must have an input report but some malicious devices violate this assumption. So this patch checks hid_device's input is non empty before it's been used.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | <4.4.286 | |
| Linux kernel | >=4.5<4.9.285 | |
| Linux kernel | >=4.10<4.14.249 | |
| Linux kernel | >=4.15<4.19.209 | |
| Linux kernel | >=4.20<5.4.151 | |
| Linux kernel | >=5.5<5.10.71 | |
| Linux kernel | >=5.11<5.14.10 | |
| Linux kernel | =5.15-rc1 | |
| Linux kernel | =5.15-rc2 | |
| Linux kernel | =5.15-rc3 |
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Reference Links
- https://git.kernel.org/stable/c/a4faa7153b87fbcfe4be15f4278676f79ca6e019
- https://git.kernel.org/stable/c/6fc4476dda58f6c00097c7ddec3b772513f57525
- https://git.kernel.org/stable/c/1c83c38dec83d57bc18d0c01d82c413d3b34ccb9
- https://git.kernel.org/stable/c/bb8b72374db69afa25a5b65cf1c092860c6fe914
- https://git.kernel.org/stable/c/fe9bb925e7096509711660d39c0493a1546e9550
- https://git.kernel.org/stable/c/dedfc35a2de2bae9fa3da8210a05bfd515f83fee
- https://git.kernel.org/stable/c/708107b80aa616976d1c5fa60ac0c1390749db5e
- https://git.kernel.org/stable/c/1e4ce418b1cb1a810256b5fb3fd33d22d1325993
Frequently Asked Questions
What is the severity of CVE-2021-47404?
CVE-2021-47404 has a medium severity rating due to its impact on the Linux kernel and potential for exploitation.
How does CVE-2021-47404 affect the Linux kernel?
CVE-2021-47404 can lead to a slab-out-of-bounds write in the hid-betopff driver, which could potentially allow attackers to manipulate memory.
What versions of the Linux kernel are affected by CVE-2021-47404?
CVE-2021-47404 affects several versions of the Linux kernel from 4.4.286 up to 5.15-rc3.
How can I remediate CVE-2021-47404?
To fix CVE-2021-47404, update the Linux kernel to a version that has patched this vulnerability.
What kind of exploitation risk does CVE-2021-47404 pose?
CVE-2021-47404 poses a risk of remote code execution or crashing the system due to improper input handling in the driver.
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