CVE-2026-43141

Description

In the Linux kernel, the following vulnerability has been resolved: ntb: ntb_hw_switchtec: Fix shift-out-of-bounds for 0 mw lut Number of MW LUTs depends on NTB configuration and can be set to zero, in such scenario rounddown_pow_of_two will cause undefined behaviour and should not be performed. This patch ensures that rounddown_pow_of_two is called on valid value.

References

• https://git.kernel.org/stable/c/186615f8855a0be4ee7d3fcd09a8ecc10e783b08
• https://git.kernel.org/stable/c/1a867d0d79a4a570a33f2f433919ad2bd7a27b67
• https://git.kernel.org/stable/c/2e4d5e8d86a969318340be95470bb76e52392082
• https://git.kernel.org/stable/c/5590cd04d6845c01a6bad985a491c58af6fb5389
• https://git.kernel.org/stable/c/a11d03d116eef138a7249202bd772c8e61915aec