CVE-2026-97617
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.
How to fix
- Linux Linuxf2099644e1b2a2c0805c5240d63ab0522d9d0174, 9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06, 32bf47db9237c5b8b6f6aaa5356bb4c79d241f76, d860c67c051685abb0460b593b193f0f45f4fa92 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 117c39200d9d760cbd5944bb89efb7b9c51965aa ≤ v < f2099644e1b2a2c0805c5240d63ab0522d9d0174, 117c39200d9d760cbd5944bb89efb7b9c51965aa ≤ v < 9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06, 117c39200d9d760cbd5944bb89efb7b9c51965aa ≤ v < 32bf47db9237c5b8b6f6aaa5356bb4c79d241f76, 117c39200d9d760cbd5944bb89efb7b9c51965aa ≤ v < d860c67c051685abb0460b593b193f0f45f4fa92, 6.10 | f2099644e1b2a2c0805c5240d63ab0522d9d0174, 9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06, 32bf47db9237c5b8b6f6aaa5356bb4c79d241f76, d860c67c051685abb0460b593b193f0f45f4fa92 |
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