Bug 2468242 (CVE-2026-43383) - CVE-2026-43383 kernel: net/tcp-md5: Fix MAC comparison to be constant-time
Summary: CVE-2026-43383 kernel: net/tcp-md5: Fix MAC comparison to be constant-time
Keywords:
Status: NEW
Alias: CVE-2026-43383
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-08 15:06 UTC by OSIDB Bzimport
Modified: 2026-05-08 21:23 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-05-08 15:06:37 UTC 
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.
Comment 1 Keith Grant 2026-05-08 21:20:41 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050833-CVE-2026-43383-0333@gregkh/T
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