CVE-2026-43406

Severity CVSS v4.0:

Pending analysis

Type:

CWE-125 Out-of-bounds Read

Publication date:

08/05/2026

Last modified:

21/05/2026

Description

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.

Impact

Vector 3.x

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

Base Score: 9.10 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

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

Base Score 3.x

9.10

Severity 3.x

CRITICAL

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.203 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.167 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.130 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.78 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.18.19 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.19 (including)	6.19.9 (excluding)
cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc2::::::
cpe:2.3:o:linux:linux_kernel:7.0:rc3::::::

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

CVE-2026-43406

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools