In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: Fix runtime PM leak in amdgpu_debugfs_test_ib_show()… (CVE-2026-98519)

The Linux kernel's amdgpu driver had a flaw in amdgpu_debugfs_test_ib_show() where the device was resumed using pm_runtime_get_sync() before acquiring a reset domain semaphore with down_write_killable(). If the semaphore acquisition was interrupted, the function returned without calling pm_runtime_put_autosuspend(), causing a runtime PM reference leak and keeping the GPU awake. The fix involves dropping the runtime PM reference on the interrupted semaphore acquisition error path to prevent the leak.

The vulnerability causes a runtime power management reference leak that keeps the GPU awake longer than necessary, potentially leading to increased power consumption and reduced battery life on affected systems. There is no indication of direct security compromise or code execution from this issue.

A fix has been implemented in the Linux kernel to address this issue by properly releasing the runtime PM reference on error paths. Users should update to the patched kernel version containing the commit ec30a576c2d4c0364549e6c04218f50704ef56c8 or later. No additional mitigation is required beyond applying the official fix.