Published May 28, 2026Sources checked Nov 13, 2026
7.8HIGHCVSS out of 10
What this means
Review the available evidence
CVE-2026-46122 and is rated High severity with a CVSS score of 7.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Jun 9, 2026
CBL-Mariner Releases
Vendor-listed releases
6.6.141.1-1
CISA KEVNot listedBased on the latest collected catalog
EPSS0.1%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is CVE-2026-46122?
In the Linux kernel, the following vulnerability has been resolved:
wifi: b43: enforce bounds check on firmware key index in b43_rx()
The firmware-controlled key index in b43_rx() can exceed the dev->key[] array size (58 entries). The existing B43_WARN_ON is non-enforcing in production builds, allowing an out-of-bounds read.
Make the B43_WARN_ON check enforcing by dropping the frame when the firmware returns an invalid key index.