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CVE-2025-40096 is a double-free vulnerability in the Linux kernel DRM scheduler function drm_sched_job_add_resv_dependencies(). The dependency helper drm_sched_job_add_dependency() consumes a fence reference on both success and failure. When xarray expansion fails, the caller nevertheless invokes dma_fence_put() during error handling, releasing the already-consumed reference a second time. Earlier changes to drm_sched_job_add_implicit_dependencies() altered the erroneous reference handling without eliminating the underlying flaw. The double free can potentially cause kernel memory corruption and denial of service, with privilege escalation possible depending on exploitability.
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A double-free vulnerability in the Linux kernel DRM scheduler's dependency handling. If adding a dependency fails, the caller releases a fence reference already consumed by drm_sched_job_add_dependency(). The reference assigns a CVSS v3 base score of 7.8, with local access and low privileges required and potentially high confidentiality, integrity, and availability impacts. The prescribed fix is to update Echo linux packages to version 6.1.158-1 or later.
A Linux kernel drm/sched double-free vulnerability in drm_sched_job_add_resv_dependencies.
A Linux kernel vulnerability in drm/sched that could cause a potential double free in drm_sched_job_add_resv_dependencies.
A Linux kernel vulnerability involving a potential double free in drm_sched_job_add_resv_dependencies.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
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