CVE-2026-43255
wifi: libertas: fix WARNING in usb_tx_block
In the Linux kernel, the following vulnerability has been resolved:
wifi: libertas: fix WARNING in usb_tx_block
The function usb_tx_block() submits cardp->tx_urb without ensuring that
any previous transmission on this URB has completed. If a second call
occurs while the URB is still active (e.g. during rapid firmware loading),
usb_submit_urb() detects the active state and triggers a warning:
'URB submitted while active'.
Fix this by enforcing serialization: call usb_kill_urb() before
submitting the new request. This ensures the URB is idle and safe to reuse.
Affected products
Linux · LinuxWant to know if your infrastructure is exposed to this?
Talk to TrueHacking →References
https://git.kernel.org/stable/c/2902a9b4415a6bafc9b1e5dd360f065d757a0bb7https://git.kernel.org/stable/c/3308c7504e093b22e91a4468470309cee2e26b83https://git.kernel.org/stable/c/498525d8358d6d20918787e59736d5b6a021e9fdhttps://git.kernel.org/stable/c/5bfb25495e391a1be0db94b15715174fa06b93a1https://git.kernel.org/stable/c/948a39c95d0f8d73722910f8cdb7b6e3e9206232https://git.kernel.org/stable/c/b82073564373e68c6ae3a96039fae14cd002a496https://git.kernel.org/stable/c/d66676e6ca96bf8680f869a9bd6573b26c634622https://git.kernel.org/stable/c/fc188b44547dea4e7350833171982a6312befde9