Riskcovery

CVE-2025-39963

io_uring: fix incorrect io_kiocb reference in io_link_skb

State
Published
Severity
7.8 High
Published
Oct 9, 2025
Updated
Oct 15, 2026
Reserved
Apr 16, 2025

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 6fe4220912d19152a26ce19713ab232f4263018d to before a89c34babc2e5834aa0905278f26f4dbe4b26b76Affected
  • 6fe4220912d19152a26ce19713ab232f4263018d to before 50a98ce1ea694f1ff8e87bc2f8f84096d1736f6aAffected
  • 6fe4220912d19152a26ce19713ab232f4263018d to before 2c139a47eff8de24e3350dadb4c9d5e3426db826Affected
LinuxLinux
  • 6.10Affected
  • before 6.10Not affected
  • 6.12.49 through 6.12.*Not affected
  • 6.16.9 through 6.16.*Not affected
  • 6.17 and laterNot affected

References

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