Bug 2425091 (CVE-2022-50781)

Summary: CVE-2022-50781 kernel: amdgpu/pm: prevent array underflow in vega20_odn_edit_dpm_table()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
An array underflow vulnerability was found in the Linux kernel's AMD GPU power management driver. In vega20_odn_edit_dpm_table(), the input_index variable is validated to be at most 2 but is not checked for negative values. Since this value is user-controlled via sysfs, a user can provide a negative value causing an out-of-bounds array read.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-12-24 14:02:11 UTC 
In the Linux kernel, the following vulnerability has been resolved:

amdgpu/pm: prevent array underflow in vega20_odn_edit_dpm_table()

In the PP_OD_EDIT_VDDC_CURVE case the "input_index" variable is capped at
2 but not checked for negative values so it results in an out of bounds
read.  This value comes from the user via sysfs.
Comment 1 Alexander B 2025-12-25 03:19:29 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122401-CVE-2022-50781-3d18@gregkh/T