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CVE

CVE-2026-43255

In the Linux kernel, the following vulnerability has been resolved: wifi: libertas: fix WARNING in usb_tx_block The fu

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.

MEDIUM · CVSS 5.5 EPSS 0.00013
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
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Affected Products & Versions

7
linux kernel>= 2.6.22 and < 5.10.252
linux kernel>= 5.11 and < 5.15.202
linux kernel>= 5.16 and < 6.1.165
linux kernel>= 6.2 and < 6.6.128
linux kernel>= 6.7 and < 6.12.75
linux kernel>= 6.13 and < 6.18.16
linux kernel>= 6.19 and < 6.19.6
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Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD06 May 2026 · 12:16 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

8
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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
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