CVE-2026-68411 is a vulnerability in Linux Kernel
Published on August 10, 2026
wifi: mac80211_hwsim: clamp virtio RX length before skb_put
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211_hwsim: clamp virtio RX length before skb_put
hwsim_virtio_rx_work() passes the virtqueue used-ring length reported by
the device straight to skb_put() on a fixed-size receive skb. A backend
reporting a length larger than the skb tailroom drives skb_put() past the
buffer end and hits skb_over_panic() -- a host-triggerable guest panic
(denial of service).
Clamp the length to the skb's available room before skb_put(). A
conforming device never reports more than the posted buffer size, so valid
frames are unaffected; a truncated over-report then fails the
length/header checks in hwsim_virtio_handle_cmd() and is dropped, so
truncating rather than dropping here cannot be turned into a parsing
problem.
Products Associated with CVE-2026-68411
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version 5d44fe7c9808c56e136e59147bd932f5491520f1 and below 82c5a30a66e2a7337d99476c67d6fc1a99c4250e is affected.
- Version 5d44fe7c9808c56e136e59147bd932f5491520f1 and below fade308845c89f784da8a6780c1e77258488f1b6 is affected.
- Version 5d44fe7c9808c56e136e59147bd932f5491520f1 and below 6dc76371a9a360c29de00df5b11563102d9d675a is affected.
- Version 5d44fe7c9808c56e136e59147bd932f5491520f1 and below 99dc05c75acc3c8cde8d89c5371f4b569de5ac62 is affected.
- Version 5d44fe7c9808c56e136e59147bd932f5491520f1 and below 10a2b430f8f06ae14b9590b6f6faa6b588ef0654 is affected.
- Version 5.7 is affected.
- Before 5.7 is unaffected.
- Version 6.6.148, <= 6.6.* is unaffected.
- Version 6.12.101, <= 6.12.* is unaffected.
- Version 6.18.42, <= 6.18.* is unaffected.
- Version 7.1.6, <= 7.1.* is unaffected.
- Version 7.2-rc4, <= * is unaffected.