Linux Kernel Vulnerability in Rust Binder - Affected by Process Offset Manipulation

CVE-2026-43433

What is CVE-2026-43433?

A vulnerability within the Rust Binder implementation of the Linux kernel allows for potential privilege escalation due to improper handling of an offsets array in a transaction. When a transaction is processed, the offsets array is copied into a target process's virtual memory area (vma). While this mapping is generally read-only, a compromised process could exploit its ability to write to its own vma, allowing it to manipulate offsets before they are read back. This misinterpretation could lead to serious security implications, as it may facilitate an unauthorized elevation of privileges for the receiver, especially if the payload is constructed in a specific manner. To mitigate the risk, the kernel's code has been adjusted to prevent this subtle time-of-check-to-time-of-use (TOCTOU) race condition that could be exploited under specific circumstances.

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