CVE-2025-39963

Published: Oct 9, 2025Modified: Feb 26, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: NVD

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.

Affected (8)

Products: Linux: Linux Kernel

Linux

1 product

Linux Kernel

Configuration A

8 vulnerable

Vulnerable Software	Affected Versions
Linux Linux Kernel	From 6.10 to 6.12.49
Linux Linux Kernel	From 6.13 to 6.16.9
Linux Linux Kernel	Version 6.17 rc1
Linux Linux Kernel	Version 6.17 rc2
Linux Linux Kernel	Version 6.17 rc3
Linux Linux Kernel	Version 6.17 rc4
Linux Linux Kernel	Version 6.17 rc5
Linux Linux Kernel	Version 6.17 rc6

Related CWEs

CWE-401

Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.

References (3)

https://git.kernel.org/stable/c/2c139a47eff8de24e3350dadb4c9d5e3426db826

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Patch

https://git.kernel.org/stable/c/50a98ce1ea694f1ff8e87bc2f8f84096d1736f6a

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Patch

https://git.kernel.org/stable/c/a89c34babc2e5834aa0905278f26f4dbe4b26b76

Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Patch

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