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CVE-2026-98078

4.4 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ipvs: fix reversed sequence option serialization hton_seq() expects the host-order source first and the unaligned network-order…

Published Sep 25, 2026linuxCWE-125EPSS 0.15%

Overview

CVE-2026-98078 is a medium-severity vulnerability affecting linux linux_kernel. It was published on September 25, 2026 and has a CVSS 3.1 base score of 4.4 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ipvs: fix reversed sequence option serialization

hton_seq() expects the host-order source first and the unaligned

network-order destination second. The version 1 sync sender passes these

arguments in reverse for both sequence blocks. This leaves 24 bytes of the

kmalloc-backed message unwritten. It may disclose stale heap data and

replace the live connection sequence state with values read from the

buffer.

Pass the connection sequence state as the source and the message payload as

the destination for both blocks.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 2.6.39, < 6.12.111Affected

References

Refgit.kernel.org/stable/c/524599714558da83747c04952d378155c69f5b6bRefgit.kernel.org/stable/c/677ff8ab30a663cde984d8afe86465fd0d81aeefRefgit.kernel.org/stable/c/ae38b2ae16f709c0193e1b4340bde26ef3e2687dRefgit.kernel.org/stable/c/b04578b74f2d3755548fe9e829e3b2a6c6f966a1Refgit.kernel.org/stable/c/bbc68ba258a4eb0a2ca3b3a105550801aa8b00b0Refgit.kernel.org/stable/c/de6cc6ec7932bc530f2bb92005dac9123d50659cRefgit.kernel.org/stable/c/e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ecRefgit.kernel.org/stable/c/f487b5788f15c6c32a219ed1480d25c93fc18d30

How CyberStrike helps

Frequently asked questions

What is CVE-2026-98078?

CVE-2026-98078 is a medium-severity vulnerability affecting linux linux_kernel. It was published on September 25, 2026 and has a CVSS 3.1 base score of 4.4 (MEDIUM).

How severe is CVE-2026-98078?

This vulnerability has a CVSS 3.1 base score of 4.4, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-98078?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-98078?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-98078 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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