CVE-2026-64568

7.8 HIGH

Published 2026-08-05 · Updated 2026-08-08

AI risk analysis

Summary: This vulnerability in the Linux kernel's mac80211 subsystem can lead to a double-free condition, which could result in a kernel crash or potentially other issues.
Exploitability: Exploitation requires specific conditions, such as a failure in kzalloc during the allocation of a replacement template, making it less likely but still possible with the right circumstances.
Blast radius: If exploited, the impact could be severe, potentially leading to a denial of service or other kernel-level issues affecting the system's stability.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the specific patched version: 'Upgrade to Linux kernel version 6.2.10 or later'.

kerneldouble-freestability

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix unsol_bcast_probe_resp double free on alloc failure ieee80211_set_unsol_bcast_probe_resp() calls kfree_rcu() on the old template before allocating the replacement. If the kzalloc() then fails, it returns -ENOMEM while link->u.ap.unsol_bcast_probe_resp still points at the object already queued for freeing. A later update or AP teardown re-queues that same rcu_head; the second free is caught by KASAN when the RCU sheaf is processed in softirq: BUG: KASAN: double-free in rcu_free_sheaf (mm/slub.c:5850) Free of addr ffff88800d06f300 by task exploit/145 ... __rcu_free_sheaf_prepare (mm/slub.c:2634 mm/slub.c:2940) rcu_free_sheaf (mm/slub.c:5850) rcu_core (kernel/rcu/tree.c:2617 kernel/rcu/tree.c:2869) handle_softirqs (kernel/softirq.c:622) The buggy address belongs to the cache kmalloc-128 of size 128 Queue the old object for kfree_rcu() only after the new one is published, matching ieee80211_set_probe_resp() and ieee80211_set_s1g_short_beacon().

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.