Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-53321

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
26/06/2026
Last modified:
06/07/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> io_uring/napi: cap busy_poll_to 10 msec<br /> <br /> Currently there&amp;#39;s no cap on the maximum amount of time that napi is<br /> allowed to poll if no events are found, which can lead to kernel<br /> complaints on a task being stuck as there&amp;#39;s no conditional rescheduling<br /> done within that loop.<br /> <br /> Just cap it to 10 msec in total, that&amp;#39;s already way above any kind of<br /> sane value that will reap any benefits, yet low enough that it&amp;#39;s<br /> nowhere near being able to trigger preemption complaints.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.9 (including) 6.18.33 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 7.0.10 (excluding)
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools