Description

In the Linux kernel, the following vulnerability has been resolved: firmware: cs_dsp: Fix overflow checking of wmfw header Fix the checking that firmware file buffer is large enough for the wmfw header, to prevent overrunning the buffer. The original code tested that the firmware data buffer contained enough bytes for the sums of the size of the structs wmfw_header + wmfw_adsp1_sizes + wmfw_footer But wmfw_adsp1_sizes is only used on ADSP1 firmware. For ADSP2 and Halo Core the equivalent struct is wmfw_adsp2_sizes, which is 4 bytes longer. So the length check didn't guarantee that there are enough bytes in the firmware buffer for a header with wmfw_adsp2_sizes. This patch splits the length check into three separate parts. Each of the wmfw_header, wmfw_adsp?_sizes and wmfw_footer are checked separately before they are used.

Weaknesses 1

Affected Products 10

References 5

• git.kernel.org https://git.kernel.org/stable/c/3019b86bce16fbb5bc1964f3544d0ce7d0137278
  Patch
• git.kernel.org https://git.kernel.org/stable/c/49a79f344d0a17c6a5eef53716cc76fcdbfca9ba
  Patch
• git.kernel.org https://git.kernel.org/stable/c/9c9877a96e033bf6c6470b3b4f06106d91ace11e
  Patch
• git.kernel.org https://git.kernel.org/stable/c/fd035f0810b33c2a8792effdb82bf35920221565
  Patch
• lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

• git.kernel.org https://git.kernel.org/stable/c/3019b86bce16fbb5bc1964f3544d0ce7d0137278
  Patch
• git.kernel.org https://git.kernel.org/stable/c/49a79f344d0a17c6a5eef53716cc76fcdbfca9ba
  Patch
• git.kernel.org https://git.kernel.org/stable/c/9c9877a96e033bf6c6470b3b4f06106d91ace11e
  Patch
• git.kernel.org https://git.kernel.org/stable/c/fd035f0810b33c2a8792effdb82bf35920221565
  Patch