CVE-2021-47046
Published: Feb 28, 2024
Modified: May 11, 2026
Description
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.
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected 4c283fdac08abf3211533f70623c90a34f41d08d - < 403c4528e5887af3deb9838cb77a557631d1e138affected 4c283fdac08abf3211533f70623c90a34f41d08d - < 6a58310d5d1e5b02d0fc9b393ba540c9367bced5affected 4c283fdac08abf3211533f70623c90a34f41d08d - < 080bd41d6478a64edf96704fddcda52b1fd5fed7affected 4c283fdac08abf3211533f70623c90a34f41d08d - < 8e6fafd5a22e7a2eb216f5510db7aab54cc545c1 |
Linux | Linux | affected 5.5unaffected 0 - < 5.5unaffected 5.10.37 - <= 5.10.*unaffected 5.11.21 - <= 5.11.*unaffected 5.12.4 - <= 5.12.*+1 more versions |
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