CVE-2026-43255
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.
Does this matter?
Lower severity and a low EPSS score (0.13%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.13% probability · 2th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS 0.1% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://git.kernel.org/stable/c/2902a9b4415a6bafc9b1e5dd360f065d757a0bb7Patch
- https://git.kernel.org/stable/c/3308c7504e093b22e91a4468470309cee2e26b83Patch
- https://git.kernel.org/stable/c/498525d8358d6d20918787e59736d5b6a021e9fdPatch
- https://git.kernel.org/stable/c/5bfb25495e391a1be0db94b15715174fa06b93a1Patch
- https://git.kernel.org/stable/c/948a39c95d0f8d73722910f8cdb7b6e3e9206232Patch
- https://git.kernel.org/stable/c/b82073564373e68c6ae3a96039fae14cd002a496Patch
- https://git.kernel.org/stable/c/d66676e6ca96bf8680f869a9bd6573b26c634622Patch
- https://git.kernel.org/stable/c/fc188b44547dea4e7350833171982a6312befde9Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.