CVE-2026-74602
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()
In rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0.
This is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if
when freed: free_buffer_page() relies on this value. Align the value
with the actual allocation size (buffer::subbuf_order).
https://git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa
https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a
https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149