CVE-2026-43383
net/tcp-md5: Fix MAC comparison to be constant-time
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.
INFO
Published Date :
May 8, 2026, 3:16 p.m.
Last Modified :
May 8, 2026, 3:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Update the Linux kernel to the latest security patch.
- Verify MAC comparison routines use constant-time helpers.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-43383.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-43383 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-43383
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-43383 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-43383 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 08, 2026
Action Type Old Value New Value Added 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. Added Reference https://git.kernel.org/stable/c/02669e2a4d207068edce7e8b5fafd85822018ce6 Added Reference https://git.kernel.org/stable/c/345a9530756528d7ca407663d659c3c40e75c3dd Added Reference https://git.kernel.org/stable/c/46d0d6f50dab706637f4c18a470aac20a21900d3 Added Reference https://git.kernel.org/stable/c/5d305a95130a8d08b9545e47f1e18d29d59866cb Added Reference https://git.kernel.org/stable/c/821c8751fdeecdeecabeb11704dd33439c9e4bbc Added Reference https://git.kernel.org/stable/c/ae3831b44f477de048287493e184fc3ff913b624 Added Reference https://git.kernel.org/stable/c/b502e97e29d791ff7a8051f29a414535739be218