Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-63998
Linux Linux — ethtool: module: call ethnl_ops_complete() on module flash errors
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L L N U N N H 5.5 .0012 1.7 —
AFFECTED
Product Versions Fixed
Linux 32b4c8b53ee7799e34a2b1634d32d3ce1e36c44e – —
Linux 6.11 – 6.18.35
TIMELINE
Jul 19 Reserved by Linux
Jul 19 Published (CNA: Linux)
Oct 13 ENRICHED — CVE-2026-63998 (Linux). Received CVSS 5.5 and CPE data from NVD.
Description
In the Linux kernel, the following vulnerability has been resolved:
ethtool: module: call ethnl_ops_complete() on module flash errors
When validate() fails we are skipping over ethnl_ops_complete()
even tho we already called ethnl_ops_begin().
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
| July 19, 2026 | Reserved | Reserved by Linux |
| July 19, 2026 | Published | Published (CNA: Linux) |
| October 13, 2026 | ENRICHED | ENRICHED — CVE-2026-63998 (Linux). Received CVSS 5.5 and CPE data from NVD. |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
| Linux | Linux | — | 32b4c8b53ee7799e34a2b1634d32d3ce1e36c44e | — |
| Linux | Linux | — | 6.11 | 6.18.35 |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-63998 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.