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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.24% probability · 16th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-193
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.