Detections
Analytics
CVE-2026-46101
medium
Description
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.
References
https://git.kernel.org/stable/c/fe11e5c40817b84abaa5d83bfb6586d8412bfd07
https://git.kernel.org/stable/c/f370205974f171a5868c13ff30d7642fed46e47b
https://git.kernel.org/stable/c/ca24f1243ad1a4d12d6a23876bbbe3ed02099853
https://git.kernel.org/stable/c/bffef0acec9c3b837a785248a893137fb7f26c95
https://git.kernel.org/stable/c/6f820139d16a4c9865a145d4a9cf9c92cc632c14