Bug 2468219 (CVE-2026-43396)

Summary: CVE-2026-43396 kernel: drm/xe/sync: Fix user fence leak on alloc failure
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
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel, specifically within the `drm/xe/sync` component. When the `dma_fence_chain_alloc()` function fails, the user fence reference is not properly released, resulting in a memory leak. This issue could lead to system instability or denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-05-08 15:05:25 UTC
In the Linux kernel, the following vulnerability has been resolved:

drm/xe/sync: Fix user fence leak on alloc failure

When dma_fence_chain_alloc() fails, properly release the user fence
reference to prevent a memory leak.

(cherry picked from commit a5d5634cde48a9fcd68c8504aa07f89f175074a0)