CVE-2026-97599ieee802154: hwsim: serialize pib updates to fix double-free
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 89% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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().
Timeline
ID reserved
By Linux
- 1 day later
· 1 day later
Published
- 35 days later
· 35 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected f25da51fdc381ca2863248c7060b3662632f0872 – < 8f44a61f816581c35c1974c8c1a3b3c2c49e96be
- affected f25da51fdc381ca2863248c7060b3662632f0872 – < e3b4681197aa026bd2d79358de5a3d62b76b04b9
- affected f25da51fdc381ca2863248c7060b3662632f0872 – < 9973b3a67a7592a780ea12b08334539a900deec1
- affected f25da51fdc381ca2863248c7060b3662632f0872 – < d3b8f264ce09573aededd0a97dc41c8147797d8f
- affected f25da51fdc381ca2863248c7060b3662632f0872 – < db6442deecb1f13aeaf4f9d77746ea7555630fb3
- affected f25da51fdc381ca2863248c7060b3662632f0872 – < 979d5b8de8ed4e1f997aef12da5694b99be7b871
- affected 4.19
- unaffected < 4.19
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/8f44a61f816581c35c1974c8c1a3b3c2c49e96be (opens in a new tab)
- https://git.kernel.org/stable/c/e3b4681197aa026bd2d79358de5a3d62b76b04b9 (opens in a new tab)
- https://git.kernel.org/stable/c/9973b3a67a7592a780ea12b08334539a900deec1 (opens in a new tab)
- https://git.kernel.org/stable/c/d3b8f264ce09573aededd0a97dc41c8147797d8f (opens in a new tab)
- https://git.kernel.org/stable/c/db6442deecb1f13aeaf4f9d77746ea7555630fb3 (opens in a new tab)
- https://git.kernel.org/stable/c/979d5b8de8ed4e1f997aef12da5694b99be7b871 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86730 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-97599)Record last updated .