Medium severity5.5NVD Advisory· Published May 6, 2026· Updated May 11, 2026
CVE-2026-43255
CVE-2026-43255
Description
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.
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Affected products
2Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/2902a9b4415a6bafc9b1e5dd360f065d757a0bb7nvdPatch
- git.kernel.org/stable/c/3308c7504e093b22e91a4468470309cee2e26b83nvdPatch
- git.kernel.org/stable/c/498525d8358d6d20918787e59736d5b6a021e9fdnvdPatch
- git.kernel.org/stable/c/5bfb25495e391a1be0db94b15715174fa06b93a1nvdPatch
- git.kernel.org/stable/c/948a39c95d0f8d73722910f8cdb7b6e3e9206232nvdPatch
- git.kernel.org/stable/c/b82073564373e68c6ae3a96039fae14cd002a496nvdPatch
- git.kernel.org/stable/c/d66676e6ca96bf8680f869a9bd6573b26c634622nvdPatch
- git.kernel.org/stable/c/fc188b44547dea4e7350833171982a6312befde9nvdPatch
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