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CVE-2024-58088 is an improper-locking flaw in the Linux kernel BPF subsystem when freeing cgroup local-storage maps. The cgroup-storage cleanup path passed a NULL busy-counter argument to bpf_local_storage_map_free() rather than the cgroup-storage busy counter. Consequently, cleanup could acquire local-storage and map locks without first marking the storage as busy. A BPF program invoked during this window can recursively call bpf_cgrp_storage_get() and attempt to reacquire the local-storage lock, deadlocking the freeing worker. The vulnerable cgroup-storage functionality was introduced in Linux kernel 6.2.
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Linux kernel BPF cgroup-storage deadlock flaw.
A Linux kernel eBPF cgroup-storage locking flaw that can cause a deadlock while freeing a BPF map. The issue arises because the cgroup-storage map-free path did not pass the busy counter to bpf_local_storage_map_free(), allowing recursive BPF program activity to acquire local_storage->lock while the free path holds it.
A Linux kernel eBPF cgroup-storage improper-locking flaw that can cause a kernel deadlock and denial of service when cgroup storage is freed. The flaw stems from bpf_cgrp_storage not passing its busy counter to bpf_local_storage_map_free(), allowing recursive locking under a crafted BPF program workflow.
A Linux kernel BPF cgroup-storage deadlock vulnerability. The affected BPF local-storage map-free path can recursively acquire local_storage->lock when BPF programs invoke bpf_cgrp_storage_get(), causing a kernel worker to deadlock. The flaw was introduced in Linux kernel 6.2 and affects kernel/bpf/bpf_cgrp_storage.c.
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