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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7	Patch
https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138	Patch
https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5	Patch
https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1	Patch
https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7	Patch
https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138	Patch
https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5	Patch
https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

History

No history.

Information

Published : 2024-02-28 09:15

Updated : 2024-12-09 19:02

NVD link : CVE-2021-47046

Mitre link : CVE-2021-47046

CVE.ORG link : CVE-2021-47046

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-193

Off-by-one Error

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