Tracker / CVE-2025-21836
CVE-2025-21836
High 7.8
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 and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 5.19 → 6.6.79 |
| linux | linux_kernel · 6.13 → 6.13.4 |
| linux | linux_kernel · 6.7 → 6.12.16 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.