CVE-2026-46101
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
netfilter: reject zero shift in nft_bitwise
Reject zero shift operands for nft_bitwise left and right shift
expressions during initialization.
The carry propagation logic computes the carry from the adjacent 32-bit
word using BITS_PER_TYPE(u32) - shift. A zero shift operand turns this
into a 32-bit shift, which is undefined behaviour.
Reject zero shift operands in the control plane, alongside the existing
check for values greater than or equal to 32, so malformed rules never
reach the packet path.
https://git.kernel.org/stable/c/6f820139d16a4c9865a145d4a9cf9c92cc632c14
https://git.kernel.org/stable/c/bffef0acec9c3b837a785248a893137fb7f26c95
https://git.kernel.org/stable/c/ca24f1243ad1a4d12d6a23876bbbe3ed02099853
https://git.kernel.org/stable/c/f370205974f171a5868c13ff30d7642fed46e47b
https://git.kernel.org/stable/c/fe11e5c40817b84abaa5d83bfb6586d8412bfd07