CVE-2026-74540: Bluetooth: L2CAP: fix UAF in l2cap_le_connect_rsp
Published Aug 15, 2026
·Updated
Bluetooth: L2CAP: fix UAF in l2capleconnectrsp
Affected Software
2 affected componentsFixes available
Linux Linux kernel
Microsoft azl3 kernel 6.6.150.1-1<6.6.152.1-1
6.6.152.1-1
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.152.1-1
Event History
Aug 15, 2026
CVE Published
via MITRE·12:27 PM
Data Sourced
via MITRE·12:27 PM
DescriptionSeverity
Data Sourced
via NVD·01:17 PM
DescriptionSeverity
Aug 23, 2026
Data Sourced
via Microsoft·10:01 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-74540?
The severity level of CVE-2026-74540 is rated at 56.
2
How do I fix CVE-2026-74540?
To fix CVE-2026-74540, update your Linux kernel to the version that contains the patch addressing the use after free vulnerability.
3
What systems are affected by CVE-2026-74540?
CVE-2026-74540 affects versions of the Linux kernel that include the Bluetooth L2CAP component.
4
What is the impact of CVE-2026-74540?
The impact of CVE-2026-74540 can lead to potential denial of service or arbitrary code execution due to the use after free condition.
5
Who reported CVE-2026-74540?
CVE-2026-74540 was identified and reported by security researchers examining the Bluetooth subsystem in the Linux kernel.