CVE-2026-72156

Description

In the Linux kernel, the following vulnerability has been resolved: fpga: microchip-spi: fix zero header_size OOB read in mpf_ops_parse_header() mpf_ops_parse_header() reads header_size from the bitstream at MPF_HEADER_SIZE_OFFSET (24). When header_size is zero, the expression *(buf + header_size - 1) reads one byte before the buffer start. Since initial_header_size is set to 71 in mpf_ops, the fpga-mgr core guarantees the buffer is large enough to reach MPF_HEADER_SIZE_OFFSET. The only real gap is the zero header_size case, which cannot be resolved by providing a larger buffer, so return -EINVAL.

References

• https://git.kernel.org/stable/c/0d3766fecd9b2db39a18b48021c15c522997ec25
• https://git.kernel.org/stable/c/3da8eaf5469eda2353b72038d644fabddb848ce1
• https://git.kernel.org/stable/c/43a1974da6bc7ce8f4d1dc1d03d56997428c29c3
• https://git.kernel.org/stable/c/a1baee24df72ec8fd1d6925c1d5162ffff4ee3bf
• https://git.kernel.org/stable/c/c9ef79e34bc1eac4fd59051e5c7b96a74e59d46f