{"id":"CVE-2026-97599","summary":"ieee802154: hwsim: serialize pib updates to fix double-free","details":"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-\u003epib:\n\n\tpib_old = rtnl_dereference(phy-\u003epib);\n\t...\n\trcu_assign_pointer(phy-\u003epib, pib);\n\tkfree_rcu(pib_old, rcu);\n\nIt assumes the RTNL is held, but -\u003eset_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().","modified":"2026-09-26T03:48:30.457121249Z","published":"2026-09-25T10:22:13.606Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97599.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/979d5b8de8ed4e1f997aef12da5694b99be7b871"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9973b3a67a7592a780ea12b08334539a900deec1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d3b8f264ce09573aededd0a97dc41c8147797d8f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/db6442deecb1f13aeaf4f9d77746ea7555630fb3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97599.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97599"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f25da51fdc381ca2863248c7060b3662632f0872"},{"fixed":"9973b3a67a7592a780ea12b08334539a900deec1"},{"fixed":"d3b8f264ce09573aededd0a97dc41c8147797d8f"},{"fixed":"db6442deecb1f13aeaf4f9d77746ea7555630fb3"},{"fixed":"979d5b8de8ed4e1f997aef12da5694b99be7b871"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97599.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.19.0"},{"fixed":"6.12.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97599.json"}}],"schema_version":"1.9.0"}