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  4. CVE 2026 43255 wifi libertas fix warning in usbtxblock
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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-43255

wifi: libertas: fix WARNING in usb_tx_blockCVE-2026-43255

Answer in brief

CVE-2026-43255 records a Unknown severity vulnerability in wifi: libertas: fix WARNING in usb_tx_block. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 6, 2026Updated Nov 6, 2026Source checked Nov 6, 2026First seen by HOL Nov 6, 2026Material review Nov 6, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Nov 6, 2026
References
8 linked sources
Open source record

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <498525d8358d6d20918787e59736d5b6a021e9fd || >=876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <2902a9b4415a6bafc9b1e5dd360f065d757a0bb7 || >=876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <948a39c95d0f8d73722910f8cdb7b6e3e9206232 || >=876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <5bfb25495e391a1be0db94b15715174fa06b93a1 || >=876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <b82073564373e68c6ae3a96039fae14cd002a496 || >=876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <3308c7504e093b22e91a4468470309cee2e26b83 || >=876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <fc188b44547dea4e7350833171982a6312befde9 || >=876c9d3aeb989cf1961f2c228d309ba5dcfb1172 <d66676e6ca96bf8680f869a9bd6573b26c634622498525d8358d6d20918787e59736d5b6a021e9fd, 2902a9b4415a6bafc9b1e5dd360f065d757a0bb7, 948a39c95d0f8d73722910f8cdb7b6e3e9206232, 5bfb25495e391a1be0db94b15715174fa06b93a1, b82073564373e68c6ae3a96039fae14cd002a496, 3308c7504e093b22e91a4468470309cee2e26b83, fc188b44547dea4e7350833171982a6312befde9, d66676e6ca96bf8680f869a9bd6573b26c634622
Linux/Linuxgeneric2.6.22Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 498525d8358d6d20918787e59736d5b6a021e9fd if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    May 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 6, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.