CVE-2026-43383

CRITICAL EPSS 35.4%
Published May 8, 20261mo ago · Modified Jun 19, 20261w ago
9.4 CVSS 3.1
Critical
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 19, 2026 1w ago

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.

CVSS Details

Base Score
9.4
Exploitability
3.9
Impact
5.5
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
35.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥2.6.20  –  <5.10.253
linuxlinux_kernel*≥5.11  –  <6.1.167
linuxlinux_kernel*≥6.2  –  <6.6.130
linuxlinux_kernel*≥6.7  –  <6.12.78
linuxlinux_kernel*≥6.13  –  <6.18.19
linuxlinux_kernel*≥6.19  –  <6.19.9
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/02669e2a4d207068edce7e8b5fafd85822018ce6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/345a9530756528d7ca407663d659c3c40e75c3dd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/46d0d6f50dab706637f4c18a470aac20a21900d3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d305a95130a8d08b9545e47f1e18d29d59866cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/821c8751fdeecdeecabeb11704dd33439c9e4bbc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae3831b44f477de048287493e184fc3ff913b624
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b502e97e29d791ff7a8051f29a414535739be218
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ff44ec94d4fc8348600a69de0a8fa1102c23bce8

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/02669e2a4d207068edce7e8b5fafd85822018ce6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/345a9530756528d7ca407663d659c3c40e75c3dd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/46d0d6f50dab706637f4c18a470aac20a21900d3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d305a95130a8d08b9545e47f1e18d29d59866cb
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/821c8751fdeecdeecabeb11704dd33439c9e4bbc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ae3831b44f477de048287493e184fc3ff913b624
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b502e97e29d791ff7a8051f29a414535739be218
    Patch