{"id":"CVE-2026-97599","title":"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);…","summary":"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);…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f25da51fdc381ca2863248c7060b3662632f0872 < 9973b3a67a7592a780ea12b08334539a900deec1","Linux >= f25da51fdc381ca2863248c7060b3662632f0872 < d3b8f264ce09573aededd0a97dc41c8147797d8f","Linux >= f25da51fdc381ca2863248c7060b3662632f0872 < db6442deecb1f13aeaf4f9d77746ea7555630fb3","Linux >= f25da51fdc381ca2863248c7060b3662632f0872 < 979d5b8de8ed4e1f997aef12da5694b99be7b871","Linux 4.19"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:11.243","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97599","references":[{"url":"https://git.kernel.org/stable/c/979d5b8de8ed4e1f997aef12da5694b99be7b871","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9973b3a67a7592a780ea12b08334539a900deec1","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d3b8f264ce09573aededd0a97dc41c8147797d8f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/db6442deecb1f13aeaf4f9d77746ea7555630fb3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-25T11:06:38.903Z","slug":"CVE-2026-97599","body":"## Overview\n\nIn 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().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}