CVE-2026-43141

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxec0467ccbdeb69a86c8729073057bda7bce00eec < d652ef399f131fcd5f8f34266167449ee7c9e5b3affected
LinuxLinuxec0467ccbdeb69a86c8729073057bda7bce00eec < 5590cd04d6845c01a6bad985a491c58af6fb5389affected
LinuxLinuxec0467ccbdeb69a86c8729073057bda7bce00eec < a11d03d116eef138a7249202bd772c8e61915aecaffected
LinuxLinuxec0467ccbdeb69a86c8729073057bda7bce00eec < d0559d07afabfddaaded6a61a16154486b956764affected
LinuxLinuxec0467ccbdeb69a86c8729073057bda7bce00eec < 2e4d5e8d86a969318340be95470bb76e52392082affected
LinuxLinuxec0467ccbdeb69a86c8729073057bda7bce00eec < a133e3caf844a3f56b6eef89ddaa66115874f6bdaffected
LinuxLinuxec0467ccbdeb69a86c8729073057bda7bce00eec < 1a867d0d79a4a570a33f2f433919ad2bd7a27b67affected
LinuxLinuxec0467ccbdeb69a86c8729073057bda7bce00eec < 186615f8855a0be4ee7d3fcd09a8ecc10e783b08affected
LinuxLinux4.15affected
LinuxLinux0 < 4.15unaffected
LinuxLinux5.10.252 <= 5.10.*unaffected
LinuxLinux5.15.202 <= 5.15.*unaffected
LinuxLinux6.1.165 <= 6.1.*unaffected
LinuxLinux6.6.128 <= 6.6.*unaffected
LinuxLinux6.12.75 <= 6.12.*unaffected
LinuxLinux6.18.16 <= 6.18.*unaffected
LinuxLinux6.19.6 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References