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CVE-2024-46858 is a race-condition use-after-free vulnerability in the Linux kernel Multipath TCP (MPTCP) path manager. Concurrent execution of packet-processing activity and a Netlink MPTCP address-flush operation can invoke mptcp_pm_del_add_timer while remove_anno_list_by_saddr releases the associated address-list entry after leaving the pm.lock-protected critical section. The timer-deletion path can subsequently dereference the freed entry's add_timer member during synchronized timer deletion. The fix retains the timer reference while holding pm.lock, uses that retained reference for sk_stop_timer_sync(), and moves list removal into mptcp_pm_del_add_timer under the same lock, preventing accesses to entry members after the entry can be freed.
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Linux kernel MPTCP path-manager use-after-free vulnerability in __timer_delete_sync.
A use-after-free vulnerability in the Linux kernel MPTCP path manager involving __timer_delete_sync.
Use-after-free vulnerability in the Linux kernel MPTCP path manager involving __timer_delete_sync().
Use-after-free vulnerability in the Linux kernel Multipath TCP path manager involving __timer_delete_sync.
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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.
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