CVE-2026-93077cxl/features: Clamp Get Feature output size to the remaining buffer

Official description

In the Linux kernel, the following vulnerability has been resolved: cxl/features: Clamp Get Feature output size to the remaining buffer cxl_get_feature() reads a feature in a loop but passes a fixed size_out as the output capacity every iteration. On the last partial iteration the buffer has less room left, so a device that returns more than asked can overflow feat_out. Use the per-iter size data_to_rd_size, which already tracks the remaining room, as the output capacity.

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/b8abbd5c2928fd839dab702244cc57b228ab43aa
• https://git.kernel.org/stable/c/ca95b15a0760e7724e61addbdd61050be13b6406
• https://git.kernel.org/stable/c/2aeb21fe557ef154f0cdf4f9745ebd8d5b31ca83