CVE-2021-47348: drm/amd/display: Avoid HDCP over-read and corruption
First published: Tue May 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Avoid HDCP over-read and corruption Instead of reading the desired 5 bytes of the actual target field, the code was reading 8. This could result in a corrupted value if the trailing 3 bytes were non-zero, so instead use an appropriately sized and zero-initialized bounce buffer, and read only 5 bytes before casting to u64.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | <5.10.51 | |
| Linux Kernel | >=5.11<5.12.18 | |
| Linux Kernel | >=5.13<5.13.3 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2021-47348?
CVE-2021-47348 is classified as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2021-47348?
To fix CVE-2021-47348, update your Linux kernel to a version that is equal to or greater than 5.10.51 or within the specified ranges for 5.11.x and 5.13.x.
What systems are affected by CVE-2021-47348?
CVE-2021-47348 affects various versions of the Linux kernel up to 5.10.51 and certain versions between 5.11 and 5.13.3.
What type of vulnerability is CVE-2021-47348?
CVE-2021-47348 is a memory corruption vulnerability related to improper handling of HDCP data in the Linux kernel.
Can CVE-2021-47348 be exploited remotely?
Exploitation of CVE-2021-47348 requires local access to the system, making it less likely for remote attacks.
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