CVE-2026-43433
HighSummary
A vulnerability has been identified in the Linux kernel's rust_binder mechanism that allows reading values from the offsets array. If the target process gains the ability to write to its own vma, it can change the offset before it is read back, leading to misinterpretation by the kernel.
Risk Assessment
This vulnerability could lead to privilege escalation if an attacker manages to modify their process's vma. In the worst case, it may allow taking control over the sending process.
Recommendation
It is recommended to update the Linux kernel to the latest version to eliminate this vulnerability and to monitor the system for unauthorized changes to process vmas.
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- CVE-2026-80533Unknown
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: rust_binder: avoid reading the written value in offsets array When sending a transaction, its offsets array is first copied into the target proc's vma, and then the values are read back from there. This is normally fine because the vma is a read-only mapping, so the target process cannot change the value under us. However, if the target process somehow gains the ability to write to its own vma, it could change the offset before it's read back, causing the kernel to misinterpret what the sender meant. If the sender happens to send a payload with a specific shape, this could in the worst case lead to the receiver being able to privilege escalate into the sender. The intent is that gaining the ability to change the read-only vma of your own process should not be exploitable, so remove this TOCTOU read even though it's unexploitable without another Binder bug.