CVE-2026-43383

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

08/05/2026

Last modified:

26/05/2026

Description

In the Linux kernel, the following vulnerability has been resolved: net/tcp-md5: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.

Impact

Vector 3.x

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

Base Score: 9.40 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

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

Base Score 3.x

9.40

Severity 3.x

CRITICAL

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	2.6.20 (including)	5.10.253 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (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::::::

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

CVE-2026-43383

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools