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CVE-2024-57981 is a NULL pointer dereference in the Linux kernel xHCI USB host-controller driver, in command-ring stopped-command handling. When a command is queued in the final usable TRB of a ring segment, then aborted, abort completion can leave the command-ring enqueue and dequeue pointers unequal 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, causing a kernel crash. The upstream correction avoids command-timer setup when cur_cmd is NULL. The flaw was introduced in Linux kernel 3.16.
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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).
A Linux kernel xHCI USB host-controller driver NULL-pointer dereference. Under a specific command-ring abort condition, inconsistent enqueue/dequeue ring-pointer handling can cause timer setup with a NULL cur_cmd, resulting in a kernel crash/denial of service.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.