Bug 2429050 (CVE-2025-71076)

Summary: CVE-2025-71076 kernel: drm/xe/oa: Limit num_syncs to prevent oversized allocations
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A resource exhaustion flaw was found in the Intel Xe graphics driver's observability architecture (OA) interface. The OA open parameters did not validate the num_syncs value, allowing userspace to request arbitrarily large allocations. A malicious user could exhaust kernel memory by providing extreme values.
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Description OSIDB Bzimport 2026-01-13 16:03:08 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/xe/oa: Limit num_syncs to prevent oversized allocations

The OA open parameters did not validate num_syncs, allowing
userspace to pass arbitrarily large values, potentially
leading to excessive allocations.

Add check to ensure that num_syncs does not exceed DRM_XE_MAX_SYNCS,
returning -EINVAL when the limit is violated.

v2: use XE_IOCTL_DBG() and drop duplicated check. (Ashutosh)

(cherry picked from commit e057b2d2b8d815df3858a87dffafa2af37e5945b)
Comment 1 Jon Moroney 2026-01-15 03:23:19 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026011326-CVE-2025-71076-19ff@gregkh/T