// For flags

CVE-2021-47046

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

Severity Score

7.8
*CVSS v3

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.

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.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Complete
* 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
  • 2024-12-17 EPSS Updated
  • 2024-12-19 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