Bug 2562648 (CVE-2026-99149)

Summary: CVE-2026-99149 kernel: kernel: amdgpu: Denial of Service via resource leak in amdgpu_gem_userptr_ioctl
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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A flaw was found in the AMDGPU graphics driver within the Linux kernel. When memory allocation fails during user pointer memory validation in the amdgpu_gem_userptr_ioctl function, the driver immediately returns an error and bypasses required cleanup routines. This issue causes Graphics Execution Manager (GEM) objects and related tracking references to remain allocated in memory. A local user could trigger this failure to repeatedly leak kernel resources, potentially leading to a Denial of Service (DoS) through memory exhaustion.
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Description OSIDB Bzimport 2026-10-28 10:43:09 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu: fix GEM object leak on ENOMEM in userptr ioctl

When amdgpu_hmm_range_alloc() fails amdgpu_gem_userptr_ioctl() returns
-ENOMEM right away and skips the cleanup every other error path goes
through. The GEM object, the bo->parent reference on the VM root and the
MMU notifier registration are all left behind.

Use release_object here, not user_pages_done, range is still NULL at
this point.

(cherry picked from commit bbe739e407a542073ec1a7872b14843566b4919e)