Detections
Analytics
CVE-2025-21836
high
Description
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: reallocate buf lists on upgrade IORING_REGISTER_PBUF_RING can reuse an old struct io_buffer_list if it was created for legacy selected buffer and has been emptied. It violates the requirement that most of the field should stay stable after publish. Always reallocate it instead.
References
https://git.kernel.org/stable/c/8802766324e1f5d414a81ac43365c20142e85603
https://git.kernel.org/stable/c/7d0dc28dae836caf7645fef62a10befc624dd17b
https://git.kernel.org/stable/c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4
https://git.kernel.org/stable/c/146a185f6c05ee263db715f860620606303c4633