CVE-2026-43406 CRITICAL

CVE-2026-43406: libceph: prevent potential out-of-bounds reads in process_message_header()

Vendor Linux
Product Linux
Published May 8, 2026
Last update May 11, 2026

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

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

What the vulnerability does

01Description

In the Linux kernel, the following vulnerability has been resolved: libceph: prevent potential out-of-bounds reads in process_message_header() If the message frame is (maliciously) corrupted in a way that the length of the control segment ends up being less than the size of the message header or a different frame is made to look like a message frame, out-of-bounds reads may ensue in process_message_header(). Perform an explicit bounds check before decoding the message header.

Key dates

02Disclosure timeline

May 8, 2026 CVE published
May 11, 2026 Record updated