Linux Kernel Libertas Driver: URB Active Warning
CVE-2026-43255 Published on May 6, 2026
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.
Products Associated with CVE-2026-43255
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below 498525d8358d6d20918787e59736d5b6a021e9fd is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below 2902a9b4415a6bafc9b1e5dd360f065d757a0bb7 is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below 948a39c95d0f8d73722910f8cdb7b6e3e9206232 is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below 5bfb25495e391a1be0db94b15715174fa06b93a1 is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below b82073564373e68c6ae3a96039fae14cd002a496 is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below 3308c7504e093b22e91a4468470309cee2e26b83 is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below fc188b44547dea4e7350833171982a6312befde9 is affected.
- Version 876c9d3aeb989cf1961f2c228d309ba5dcfb1172 and below d66676e6ca96bf8680f869a9bd6573b26c634622 is affected.
- Version 2.6.22 is affected.
- Before 2.6.22 is unaffected.
- Version 5.10.252, <= 5.10.* is unaffected.
- Version 5.15.202, <= 5.15.* is unaffected.
- Version 6.1.165, <= 6.1.* is unaffected.
- Version 6.6.128, <= 6.6.* is unaffected.
- Version 6.12.75, <= 6.12.* is unaffected.
- Version 6.18.16, <= 6.18.* is unaffected.
- Version 6.19.6, <= 6.19.* is unaffected.
- Version 7.0, <= * is unaffected.