Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-43366

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
08/05/2026
Last modified:
12/05/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> io_uring/kbuf: check if target buffer list is still legacy on recycle<br /> <br /> There&amp;#39;s a gap between when the buffer was grabbed and when it<br /> potentially gets recycled, where if the list is empty, someone could&amp;#39;ve<br /> upgraded it to a ring provided type. This can happen if the request<br /> is forced via io-wq. The legacy recycling is missing checking if the<br /> buffer_list still exists, and if it&amp;#39;s of the correct type. Add those<br /> checks.

Impact

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

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x
7.80
Severity 3.x
HIGH

References to Advisories, Solutions, and Tools