Bug 2516508 (CVE-2026-68473)

Summary: CVE-2026-68473 kernel: powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Linux kernel's powerpc/uaccess component. The mask_user_address() function incorrectly checks for CONFIG_E500 instead of CONFIG_PPC_E500. This error prevents the mask_user_address_isel() function from being used on PowerPC E500 hardware, which could lead to improper handling of user addresses and potentially impact system security or stability.
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 2026-08-15 06:16:11 UTC
In the Linux kernel, the following vulnerability has been resolved:

powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()

mask_user_address() incorrectly checks for CONFIG_E500 instead of
CONFIG_PPC_E500, causing mask_user_address_isel() to not be used on
E500 hardware. Fix the check to use the correct name.