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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
2fcabce2d7d34f69a888146dab15b36a917f09d4 to < 146a185f6c05ee263db715f860620606303c4633affected2fcabce2d7d34f69a888146dab15b36a917f09d4 to < 7d0dc28dae836caf7645fef62a10befc624dd17baffected2fcabce2d7d34f69a888146dab15b36a917f09d4 to < 2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4affected2fcabce2d7d34f69a888146dab15b36a917f09d4 to < 8802766324e1f5d414a81ac43365c20142e85603affected
Linux Linux
Default version status: affected
5.19affected0 to < 5.19unaffected6.6.79 to ≤ 6.6.*unaffected6.12.16 to ≤ 6.12.*unaffected6.13.4 to ≤ 6.13.*unaffected6.14 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/146a185f6c05ee263db715f860620606303c4633 ↗
- https://git.kernel.org/stable/c/7d0dc28dae836caf7645fef62a10befc624dd17b ↗
- https://git.kernel.org/stable/c/2a5febbef40ce968e295a7aeaa5d5cbd9e3e5ad4 ↗
- https://git.kernel.org/stable/c/8802766324e1f5d414a81ac43365c20142e85603 ↗
- https://u1f383.github.io/slides/talks/2025_Hexacon-Deja_Vu_in_Linux_io_uring_Breaking_Memory_Sharing_Again_After_Generations_of_Fixes.pdf ↗