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CVE-2024-57981 is a NULL pointer dereference in the Linux kernel xHCI USB host-controller command-ring abort path. When a command is queued to the final usable TRB in a ring segment and later aborted, command-ring enqueue and dequeue pointers can differ despite there being no pending command. xhci_handle_stopped_cmd_ring() incorrectly interprets this state as a pending command and invokes xhci_mod_cmd_timer() with a NULL cur_cmd pointer, resulting in a kernel crash. The fix suppresses command-timer setup when cur_cmd is NULL.
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NULL-pointer dereference in Linux kernel xHCI command-abort handling.
Linux kernel xHCI command-abort NULL-pointer dereference.
A Linux kernel xHCI USB-driver NULL-pointer dereference triggered during handling of certain aborted commands, when ring pointers differ but no current command exists. The flaw can cause a kernel crash.
A Linux kernel xHCI USB driver NULL-pointer dereference during certain command-abort handling. A local, low-privileged attacker able to trigger the condition can cause a denial of service through a kernel crash. Red Hat rates it Moderate (CVSS 3.1: 5.5).
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Cross-references every affected SKU, including bundled OEM variants.
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