In the Linux kernel, the following vulnerability has been resolved: tools/nolibc/stdlib: fix memory error in realloc() Pass user_p_len to memcpy() instead of heap->len to prevent realloc() from copying an extra sizeof(heap) bytes from beyond the allocated region.
https://git.kernel.org/stable/c/f678c3c336559cf3255a32153e9a17c1be4e7c15
https://git.kernel.org/stable/c/8019d3dd921f39a237a9fab6d2ce716bfac0f983
https://git.kernel.org/stable/c/791f4641142e2aced85de082e5783b4fb0b977c2
https://git.kernel.org/stable/c/5996b2b2dac739f2a27da13de8eee5b85b2550b3
https://git.kernel.org/stable/c/4e6f225aefeb712cdb870176b6621f02cf235b8c