What is CVE-2021-47046?

CVE-2021-47046 is a high-severity vulnerability in Linux, classified under Off-by-one Error. CVSS score: 7.8/10. Published 2024-02-28.

How severe is CVE-2021-47046?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Linux

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.

EPSS: 0.002 (15.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 4c283fdac08abf3211533f70623c90a34f41d08d, 5.5, 0
Linux Linux_kernel

Weakness classification (CWE)

CWE-193 — Off-by-one Error

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2021-47046?: CVE-2021-47046 is a high-severity vulnerability in Linux, classified under Off-by-one Error. CVSS score: 7.8/10. Published 2024-02-28.
How severe is CVE-2021-47046?: High severity. CVSS v3 base score is 7.8 out of 10.