CVE-2025-39963

HighCVSS 7.8/10Last modified Oct 19, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-401

Affected software

No affected versions have been published.

Timeline

Published
Oct 9, 2025
Last modified
Oct 19, 2026
NVD status
Modified

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CVE-2025-39963: High severity, CVSS 7.8 | Vulnix