CVE-2026-97599
CVE CVE-2026-97599EUVD EUVD-2026-86730Published 2026-09-25T10:22:13.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: ieee802154: hwsim: serialize pib updates to fix double-free hwsim_update_pib() does an unserialized read-swap-free of phy->pib: pib_old = rtnl_dereference(phy->pib); ... rcu_assign_pointer(phy->pib, pib); kfree_rcu(pib_old, rcu); It assumes the RTNL is held, but ->set_channel is not always called under it: the mac802154 scan worker changes channels via drv_set_channel() without the RTNL. Such an update can race an RTNL-held one on the same phy; both read the same pib_old and both kfree_rcu() it, double-freeing the object. With SLUB percpu sheaves batching kfree_rcu(), this surfaces as a KASAN invalid-free in rcu_free_sheaf(). struct hwsim_phy has no lock for pib. Add one and make the swap atomic with rcu_replace_pointer() under it, dropping the misleading rtnl_dereference().
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 6.18.53; f25da51fdc381ca2863248c7060b3662632f0872 <979d5b8de8ed4e1f997aef12da5694b99be7b871; patch: 6.12.111; f25da51fdc381ca2863248c7060b3662632f0872 <9973b3a67a7592a780ea12b08334539a900deec1; patch: 7.3-rc3; patch: 7.2.7; patch: 0; f25da51fdc381ca2863248c7060b3662632f0872 <db6442deecb1f13aeaf4f9d77746ea7555630fb3; f25da51fdc381ca2863248c7060b3662632f0872 <d3b8f264ce09573aededd0a97dc41c8147797d8f; 4.19
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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