7.8
/ 10
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Description
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.
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.
Basic Information
ID
CVE-2026-43433
Source
Linux
Published
May 8, 2026 at 14:22
Modified
May 11, 2026 at 06:34
Affected Product
Vendor
Linux
Product
Linux
Version
eafedbc7c050c44744fbdf80bdf3315e860b7513
Affected Versions
Linux Linux eafedbc7c050c44744fbdf80bdf3315e860b7513
Linux Linux eafedbc7c050c44744fbdf80bdf3315e860b7513
Linux Linux eafedbc7c050c44744fbdf80bdf3315e860b7513
Linux Linux 6.18
Linux Linux eafedbc7c050c44744fbdf80bdf3315e860b7513
Linux Linux eafedbc7c050c44744fbdf80bdf3315e860b7513
Linux Linux 6.18