{"id":"CVE-2026-97599","published":"2026-09-25T11:17:11.243","lastModified":"2026-09-25T11:17:11.243","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nieee802154: hwsim: serialize pib updates to fix double-free\n\nhwsim_update_pib() does an unserialized read-swap-free of phy->pib:\n\n\tpib_old = rtnl_dereference(phy->pib);\n\t...\n\trcu_assign_pointer(phy->pib, pib);\n\tkfree_rcu(pib_old, rcu);\n\nIt assumes the RTNL is held, but ->set_channel is not always called\nunder it: the mac802154 scan worker changes channels via\ndrv_set_channel() without the RTNL. Such an update can race an\nRTNL-held one on the same phy; both read the same pib_old and both\nkfree_rcu() it, double-freeing the object. With SLUB percpu sheaves\nbatching kfree_rcu(), this surfaces as a KASAN invalid-free in\nrcu_free_sheaf().\n\nstruct hwsim_phy has no lock for pib. Add one and make the swap atomic\nwith rcu_replace_pointer() under it, dropping the misleading\nrtnl_dereference().","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/979d5b8de8ed4e1f997aef12da5694b99be7b871","tags":[]},{"url":"https://git.kernel.org/stable/c/9973b3a67a7592a780ea12b08334539a900deec1","tags":[]},{"url":"https://git.kernel.org/stable/c/d3b8f264ce09573aededd0a97dc41c8147797d8f","tags":[]},{"url":"https://git.kernel.org/stable/c/db6442deecb1f13aeaf4f9d77746ea7555630fb3","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}