Live › vulnerability › CVE-2026-98707
Go to dashboardIn the Linux kernel's mac80211 Wi-Fi stack, the receive block-ack session timer can stay queued after the session's memory is freed, and a stale handler can rearm it. The sources do not say what an attacker gets beyond a use-after-free in kernel memory, which typically means a crash or possible code execution.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Systems running a Linux kernel with the mac80211 Wi-Fi stack, such as laptops, desktops and embedded devices that use Wi-Fi through a mac80211 driver. Servers and hosts without a Wi-Fi interface are unlikely to load this code path, and the sources do not say more.
No product ranges from the sources yet.
uname -r and compare it against the fixed kernel release in the upstream kernel git history for CVE-2026-98707.lsmod | grep mac80211.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: shut down RX BA session timer on teardown
Tearing down an RX BA session can leave the session timer queued on a freed tid_rx. Later timer-wheel processing and the timer callback itself then run against freed memory.
An RX BAR handler can dereference tid_rx under RCU before teardown unpublishes it and stay in its read-side critical section while teardown deletes the session timer. The stale handler can then rearm the timer after timer_delete_sync() returns and before the RCU callback frees tid_rx.
Use timer_shutdown_sync() so rearm attempts become ineffective once teardown starts. Keep reorder_timer unchanged: teardown marks the session removed under reorder_lock and its release path checks that state before rearming. session_timer has no equivalent guard because ieee80211_rx_h_ctrl() rearms it before taking reorder_lock.
This page as .md · .json · in your agent: get_signal("CVE-2026-98707")
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