CVE-2021-47046

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix off by one in hdmi_14_process_transaction() The hdcp_i2c_offsets[] array did not have an entry for HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE so it led to an off by one read overflow. I added an entry and copied the 0x0 value for the offset from similar code in drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c. I also declared several of these arrays as having HDCP_MESSAGE_ID_MAX entries. This doesn't change the code, but it's just a belt and suspenders approach to try future proof the code.

• CWE-193

• https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7Patch
• https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138Patch
• https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5Patch
• https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1Patch
• https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7Patch
• https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138Patch
• https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5Patch
• https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1Patch

Published

Feb 28, 2024

Last Modified

Jun 17, 2026

Status

Analyzed

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