CVE-2024-26729

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix potential null pointer dereference in dc_dmub_srv Fixes potential null pointer dereference warnings in the dc_dmub_srv_cmd_list_queue_execute() and dc_dmub_srv_is_hw_pwr_up() functions. In both functions, the 'dc_dmub_srv' variable was being dereferenced before it was checked for null. This could lead to a null pointer dereference if 'dc_dmub_srv' is null. The fix is to check if 'dc_dmub_srv' is null before dereferencing it. Thus moving the null checks for 'dc_dmub_srv' to the beginning of the functions to ensure that 'dc_dmub_srv' is not null when it is dereferenced. Found by smatch & thus fixing the below: drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:133 dc_dmub_srv_cmd_list_queue_execute() warn: variable dereferenced before check 'dc_dmub_srv' (see line 128) drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_is_hw_pwr_up() warn: variable dereferenced before check 'dc_dmub_srv' (see line 1164)

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/351080ba3414c96afff0f1338b4aeb2983195b80	Patch
https://git.kernel.org/stable/c/d2b48f340d9e4a8fbeb1cdc84cd8da6ad143a907	Patch
https://git.kernel.org/stable/c/351080ba3414c96afff0f1338b4aeb2983195b80	Patch
https://git.kernel.org/stable/c/d2b48f340d9e4a8fbeb1cdc84cd8da6ad143a907	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc3::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc4::::::
	cpe:2.3:o:linux:linux_kernel:6.8:rc5::::::

History

07 Jan 2025, 21:14

Type	Values Removed	Values Added
First Time		Linux Linux linux Kernel
References	~~() https://git.kernel.org/stable/c/351080ba3414c96afff0f1338b4aeb2983195b80 -~~	() https://git.kernel.org/stable/c/351080ba3414c96afff0f1338b4aeb2983195b80 - Patch
References	~~() https://git.kernel.org/stable/c/d2b48f340d9e4a8fbeb1cdc84cd8da6ad143a907 -~~	() https://git.kernel.org/stable/c/d2b48f340d9e4a8fbeb1cdc84cd8da6ad143a907 - Patch
CPE		cpe:2.3:o:linux:linux_kernel:6.8:rc1:::::: cpe:2.3:o:linux:linux_kernel:6.8:rc5:::::: cpe:2.3:o:linux:linux_kernel:6.8:rc4:::::: cpe:2.3:o:linux:linux_kernel:6.8:rc2:::::: cpe:2.3:o:linux:linux_kernel:6.8:rc3:::::: cpe:2.3:o:linux:linux_kernel::::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
CWE		CWE-476

21 Nov 2024, 09:02

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: corrige una posible desreferencia de puntero nulo en dc_dmub_srv. Corrige posibles advertencias de desreferencia de puntero nulo en las funciones dc_dmub_srv_cmd_list_queue_execute() y dc_dmub_srv_is_hw_pwr_up(). En ambas funciones, se estaba desreferenciando la variable 'dc_dmub_srv' antes de verificar si era nula. Esto podría provocar una desreferencia del puntero nulo si 'dc_dmub_srv' es nulo. La solución es comprobar si 'dc_dmub_srv' es nulo antes de eliminar la referencia a él. Por lo tanto, se mueven las comprobaciones nulas de 'dc_dmub_srv' al comienzo de las funciones para garantizar que 'dc_dmub_srv' no sea nulo cuando se desreferencia. Encontrado por smatch y arreglando así lo siguiente: drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:133 dc_dmub_srv_cmd_list_queue_execute() advertencia: variable desreferenciada antes de verificar 'dc_dmub_srv' (ver línea 128) drivers/ gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:1167 dc_dmub_srv_is_hw_pwr_up() advertencia: variable desreferenciada antes de verificar 'dc_dmub_srv' (ver línea 1164)
References	~~() https://git.kernel.org/stable/c/351080ba3414c96afff0f1338b4aeb2983195b80 -~~	() https://git.kernel.org/stable/c/351080ba3414c96afff0f1338b4aeb2983195b80 -
References	~~() https://git.kernel.org/stable/c/d2b48f340d9e4a8fbeb1cdc84cd8da6ad143a907 -~~	() https://git.kernel.org/stable/c/d2b48f340d9e4a8fbeb1cdc84cd8da6ad143a907 -

03 Apr 2024, 17:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-04-03 17:15

Updated : 2025-01-07 21:14

NVD link : CVE-2024-26729

Mitre link : CVE-2024-26729

CVE.ORG link : CVE-2024-26729

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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5.5 /10