CVE-2026-98078 ipvs: fix reversed sequence option serialization

What is CVE-2026-98078?

CVE-2026-98078 is a medium-severity vulnerability in Linux kernel, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-125

Which versions are affected by CVE-2026-98078?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-98078?

Apply the vendor's patch.

Is CVE-2026-98078 being exploited?

There is no known exploitation of CVE-2026-98078 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-104762, BELL-CVE-2026-98078, DEBIAN-CVE-2026-98078, GHSA-22jc-j6q2-9wv9, UBUNTU-CVE-2026-98078.