CVE-2024-49970 drm/amd/display: Implement bounds check for stream encoder creation in DCN401
An out-of-bounds write in the AMD display driver allows attackers to cause memory corruption, potentially leading to code execution or system crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-49970?
CVE-2024-49970 is a medium-severity memory corruption vulnerability in Linux kernel, published on 21 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Implement bounds check for stream encoder creation in DCN401
'stream_enc_regs' array is an array of dcn10_stream_enc_registers structures. The array is initialized with four elements, corresponding to the four calls to stream_enc_regs() in the array initializer. This means that valid indices for this array are 0, 1, 2, and 3.
The error message 'stream_enc_regs' 4 <= 5 below, is indicating that there is an attempt to access this array with an index of 5, which is out of bounds. This could lead to undefined behavior
Here, eng_id is used as an index to access the stream_enc_regs array. If eng_id is 5, this would result in an out-of-bounds access on the stream_enc_regs array.
Thus fixing Buffer overflow error in dcn401_stream_encoder_create
Found by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn401/dcn401_resource.c:1209 dcn401_stream_encoder_create() error: buffer overflow 'stream_enc_regs' 4 <= 5
Weakness: CWE-129
Which versions are affected by CVE-2024-49970?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-49970?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2024-49970 being exploited?
There is no known exploitation of CVE-2024-49970 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-51850, AZL-51852, BELL-CVE-2024-49970, DEBIAN-CVE-2024-49970, GHSA-w7w7-6353-385q, ROOT-OS-DEBIAN-11-CVE-2024-49970 and 4 more.