ipvs: fix reversed sequence option serialization (CVE-2026-98078) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-98078

ipvs: fix reversed sequence option serialization

Answer in brief

CVE-2026-98078 records a Unknown severity vulnerability in ipvs: fix reversed sequence option serialization. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=986a075795339c5ea1122ce9290dfd5504252eb0 <e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ec \|\| >=986a075795339c5ea1122ce9290dfd5504252eb0 <524599714558da83747c04952d378155c69f5b6b \|\| >=986a075795339c5ea1122ce9290dfd5504252eb0 <de6cc6ec7932bc530f2bb92005dac9123d50659c \|\| >=986a075795339c5ea1122ce9290dfd5504252eb0 <b04578b74f2d3755548fe9e829e3b2a6c6f966a1	e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ec, 524599714558da83747c04952d378155c69f5b6b, de6cc6ec7932bc530f2bb92005dac9123d50659c, b04578b74f2d3755548fe9e829e3b2a6c6f966a1
Linux/Linuxgeneric	2.6.39	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to e1c9f9446d3eaae323f1689f9e5de3b1ad6e47ec if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.