CVE-2026-43255

wifi: libertas: fix WARNING in usb_tx_block

MEDIUM

5.5

CVSS Score

Published: May 6, 2026 at 11:28 AM UTC

Updated: June 17, 2026 at 10:49 AM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

2.6.22 ≤ v < 5.10.2522.6.22 ≤ v < 5.15.2022.6.22 ≤ v < 6.1.1652.6.22 ≤ v < 6.12.752.6.22 ≤ v < 6.18.162.6.22 ≤ v < 6.19.62.6.22 ≤ v < 6.6.1282.6.22 ≤ v < 7.05.11 ≤ v < 5.15.2025.16 ≤ v < 6.1.1656.13 ≤ v < 6.18.166.19 ≤ v < 6.19.66.2 ≤ v < 6.6.1286.7 ≤ v < 6.12.752.6.22876c9d3aeb989cf1961f2c228d309ba5dcfb1172

Vendor states this is fixed in 2902a9b4415a6bafc9b1e5dd360f065d757a0bb7 (fixed)

Vendor states this is fixed in 3308c7504e093b22e91a4468470309cee2e26b83 (fixed)

Vendor states this is fixed in 498525d8358d6d20918787e59736d5b6a021e9fd (fixed)

Vendor states this is fixed in 5bfb25495e391a1be0db94b15715174fa06b93a1 (fixed)

Vendor states this is fixed in 948a39c95d0f8d73722910f8cdb7b6e3e9206232 (fixed)

Vendor states this is fixed in b82073564373e68c6ae3a96039fae14cd002a496 (fixed)

Vendor states this is fixed in d66676e6ca96bf8680f869a9bd6573b26c634622 (fixed)

Vendor states this is fixed in fc188b44547dea4e7350833171982a6312befde9 (fixed)

Vendor states this is fixed in 2.6.22 (unaffected)

Vendor states this is fixed in 5.10.252 (unaffected)

Vendor states this is fixed in 5.15.202 (unaffected)

Vendor states this is fixed in 6.1.165 (unaffected)