CVE-2026-97617 | BDVDB-2026-379366 Detail

Description#

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Check resize_disabled before publishing the new subbuf order ring_buffer_subbuf_order_set() stores the new order and only then walks the CPUs, returning -EBUSY if any of them has resizing disabled. A user mapped buffer has resizing disabled, and __rb_map_vma() reads buffer->subbuf_order without buffer->mutex, so an mmap of an already mapped CPU racing the failing order change sizes the mapping with the new order and inserts pages past the sub-buffer into the VMA. Check the CPUs before storing the new order.

Impact#

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Exploit#

History#

1. Version 12026-09-25Record published in the CVE List.
2. Version 22026-10-19Most recent update recorded in the CVE List.