Double free in Linux kernel - CVE-2026-92506

Vulnerability identifier: #VU151007

CSH Severity: Low

CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-92506

CWE-ID: CWE-415

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a double free in scmi_protocol_device_unrequest() when two SCMI drivers for the same protocol unregister concurrently. A local user can trigger concurrent unregistration of the drivers to cause a denial of service.

Linux kernel
Debian Linux
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oracle (Ubuntu package)
linux-ibm (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux (Debian package)

Install security update from vendor's repository.

linux (Ubuntu package) - update to 7.0.0-42.42
linux-aws (Ubuntu package) - update to 7.0.0-1016.17
linux-gcp (Ubuntu package) - update to 7.0.0-1016.18
linux-oracle (Ubuntu package) - update to 7.0.0-1015.16
linux-ibm (Ubuntu package) - update to 7.0.0-1017.17
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-42.42~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1017.17
linux (Debian package) - update to 6.12.111-1

• https://git.kernel.org/stable/c/1c35915eaaa81a12340c838c5c2ccb02be2194c3
• https://git.kernel.org/stable/c/21d35c5f46e99e9047bb9ded3ecb5ab440dd75b3
• https://git.kernel.org/stable/c/2c4097e6c4aed276c5e9ec2ab331ab397ea780bf
• https://git.kernel.org/stable/c/2ff7713b7308cd6bea3328f7cd750b5eaab42af3
• https://git.kernel.org/stable/c/c3d4ef1c0ca6917aad6f1093b49f3932944a8c19

• Double free in Linux kernel firmware arm_scmi driver
• Debian update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux, linux-aws, linux-gcp and more