SB2026050948 - Improper control of a resource through its lifetime in Linux kernel dts qcom

Description

This security bulletin contains information about 1 vulnerability.

1) Improper control of a resource through its lifetime (CVE-ID: CVE-2026-43347)

CWE-ID: CWE-664 - Improper control of a resource through its lifetime

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

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

The vulnerability exists due to improper memory reservation in arm64 device tree memory handling for qcom monaco platforms when managing hypervisor-owned memory regions. A local user can trigger access to incorrectly unreserved hypervisor-owned memory to cause a denial of service.

The issue occurs on Monaco-based platforms where part of the Gunyah hypervisor metadata region is reported as conventional memory instead of reserved memory.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/59bd9088336d2bb7e713dcf4df5cbda86bb3c611
• https://git.kernel.org/stable/c/85d98669fa7f1d3041d962515e45ee6e392db6f8
• https://git.kernel.org/stable/c/edde62571f7602d83243ca51729ce42d22ea04d2