CVE-2025-39963CWE-401

CVE-2025-39963

High · published October 9, 2025

CVSS v3.1
7.8
EPSS
0%
Percentile
4.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00152 · 4.0th percentile
Weakness
CWE-401 · Missing Release of Memory after Effective Lifetime
Published
2025-10-09T17:15Z
Affected products (8)
ProductVersionsFixed in
linux/linux_kernel≥ 6.10, < 6.12.496.12.49
linux/linux_kernel≥ 6.13, < 6.16.96.16.9
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
References (3)
https://git.kernel.org/stable/c/2c139a47eff8de24e3350dadb4c9d5e3426db826 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/50a98ce1ea694f1ff8e87bc2f8f84096d1736f6a · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a89c34babc2e5834aa0905278f26f4dbe4b26b76 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 09 OCT 12:13Z
    io_uring: fix incorrect io_kiocb reference in io_link_skb
    cvelistv5