CVE-2026-43255

MediumCVSS 5.5/10Last modified Nov 11, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected software

VendorProductVersions
LinuxLinux>= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 498525d8358d6d20918787e59736d5b6a021e9fd; >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 2902a9b4415a6bafc9b1e5dd360f065d757a0bb7; >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 948a39c95d0f8d73722910f8cdb7b6e3e9206232; >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 5bfb25495e391a1be0db94b15715174fa06b93a1; >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < b82073564373e68c6ae3a96039fae14cd002a496; >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < 3308c7504e093b22e91a4468470309cee2e26b83; >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < fc188b44547dea4e7350833171982a6312befde9; >= 876c9d3aeb989cf1961f2c228d309ba5dcfb1172, < d66676e6ca96bf8680f869a9bd6573b26c634622
LinuxLinux2.6.22

References

Timeline

Published
May 6, 2026
Last modified
Nov 11, 2026
NVD status
Analyzed

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CVE-2026-43255: Medium severity, CVSS 5.5 | Vulnix