CVE-2026-98144
UnknownSummary
In the Linux kernel, the accel/amdxdna driver's amdxdna_cmd_set_error() takes a reference to the first BO of a command chain but fails to drop it on the mapping failure path, leaking the reference. The path is reachable when the BO handle is recycled by userspace after submission and a dma-buf without a vmap implementation is imported onto the same id.
Risk Assessment
A local user with access to the render node can trigger a BO reference leak, leading to memory leakage and potential denial of service with repeated exploitation.
Recommendation
Update the Linux kernel to a version with the fix that drops the BO reference on the mapping failure path in amdxdna_cmd_set_error().
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: put the chained BO when its mapping fails amdxdna_cmd_set_error() looks up the first BO of a command chain, which takes a reference, and drops it at the end of the function. The mapping of that BO is established in between, and the failure path returns without the put, so the reference is leaked. Ordinary use does not reach it. The chain has been submitted before any of this runs, so aie2_cmdlist_fill_slot() has already called amdxdna_cmd_get_op() on that BO and amdxdna_gem_vmap() has cached its address. What makes it reachable is that the BO is resolved again by handle here, and the handle is userspace's to recycle: closing it after submission and importing a dma-buf whose exporter implements no vmap onto the same id leaves amdxdna_gem_get_obj() returning an object this cannot map, since prime_import() types every import AMDXDNA_BO_SHARE.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS