Improper access control in Linux kernel - CVE-2026-43434
Published: May 8, 2026
Vulnerability identifier: #VU130750
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-43434
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to modify normally read-only binder pages.
The vulnerability exists due to improper access control in Rust Binder VMA handling when looking up a VMA by address and installing or zapping pages. A local user can remap memory so that Rust Binder interacts with the wrong VMA to modify normally read-only binder pages.
The issue occurs if the original VMA is closed and replaced with a different VMA at the same address.
How to mitigate CVE-2026-43434
Install security update from vendor's repository.