CVE-2026-43366
High
Description
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: check if target buffer list is still legacy on recycle There's a gap between when the buffer was grabbed and when it potentially gets recycled, where if the list is empty, someone could've upgraded it to a ring provided type. This can happen if the request is forced via io-wq. The legacy recycling is missing checking if the buffer_list still exists, and if it's of the correct type. Add those checks.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedMay 8, 2026
First seenMay 8, 2026
Weakness typeCWE-362Race condition
How to fix
Update
- linux linux_kernel6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.19 ≤ v < 6.1.167, 6.2 ≤ v < 6.6.130, 6.7 ≤ v < 6.12.78, 6.13 ≤ v < 6.18.19, 6.19 ≤ v < 6.19.9, 7.0 | 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9 |
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