// For flags

CVE-2021-47046

drm/amd/display: Fix off by one in hdmi_14_process_transaction()

Severity Score

"-"
*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm/amd/display: corrección por uno en hdmi_14_process_transaction() La matriz hdcp_i2c_offsets[] no tenía una entrada para HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE, por lo que provocó un desbordamiento de lectura desactivado por uno. Agregué una entrada y copié el valor 0x0 para el desplazamiento de un código similar en drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c. También declaré que varias de estas matrices tenían entradas HDCP_MESSAGE_ID_MAX. Esto no cambia el código, pero es solo un enfoque de cinturón y tirantes para probar el código a prueba de futuro.

*Credits: N/A
CVSS Scores
Attack Vector
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Attack Complexity
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Privileges Required
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User Interaction
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Scope
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Confidentiality
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Integrity
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Availability
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* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-27 CVE Reserved
  • 2024-02-28 CVE Published
  • 2024-02-29 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.5 < 5.10.37
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.10.37"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.5 < 5.11.21
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.11.21"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.5 < 5.12.4
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.12.4"
en
Affected
Linux
Search vendor "Linux"
 Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
 >= 5.5 < 5.13
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.5 < 5.13"
en
Affected