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CVE-2026-43383

Last refreshed2026-10-17

Status: UPDATED  |  Advisory ID: CVE-2026-43383

Key Details

CVECVE-2026-43383
CVSS Score / Version
9.4 (Critical) / CVSS v3.1
Updated2026-10-16
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H
CVSS Prose
attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is low; integrity impact is high; availability impact is high.
Affected products
Linux Kernel

Affected Products, Subsystems & Sectors

VendorProductAffected VersionsPatch Status
LinuxLinux Kernel
SubsystemsOT Supporting Infrastructure
SectorsAll Sectors

What to Know

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. (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-43383
CVEhttps://www.cve.org/CVERecord?id=CVE-2026-43383

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