CVE-2025-39963
High
Description
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix incorrect io_kiocb reference in io_link_skb In io_link_skb function, there is a bug where prev_notif is incorrectly assigned using 'nd' instead of 'prev_nd'. This causes the context validation check to compare the current notification with itself instead of comparing it with the previous notification. Fix by using the correct prev_nd parameter when obtaining prev_notif.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux Kernel
PublishedOct 9, 2025
First seenOct 9, 2025
How to fix
Update
- linux linux_kernel6.12.49, 6.16.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.10 ≤ v < 6.12.49, 6.13 ≤ v < 6.16.9, 6.17 | 6.12.49, 6.16.9 |
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