CVE-2025-39963
BaseFortify
Publication date: 2025-10-09
Last updated on: 2026-02-26
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | 6.17 |
| linux | linux_kernel | From 5.15.160 (inc) to 5.16 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-401 | The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a bug in the Linux kernel's io_uring subsystem, specifically in the io_link_skb function. The issue is that a variable called prev_notif is assigned incorrectly using 'nd' instead of 'prev_nd'. This causes the validation check to compare the current notification with itself rather than with the previous notification, potentially leading to incorrect behavior in the kernel's I/O operations.
How can this vulnerability impact me? :
The incorrect assignment in the io_link_skb function can cause improper context validation in the Linux kernel's io_uring subsystem. This may lead to unexpected or incorrect handling of I/O notifications, which could affect system stability or reliability when performing asynchronous I/O operations.