VulnerabilityPublished 19 Jul 2026Updated 21 Oct 2026

CVE-2026-63998: Linux kernel · ethtool: module: call ethnl_ops_complete() on module flash errors

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e96ef1a40dda5b637b1911cd950b11e9848de939 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 1% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e96ef1a40dda5b637b1911cd950b11e9848de939, d9defbf8b62bde89e206d74c2a2b445b9ed66108, 84371fb58423f997939aacdcbc02d128d76a54e5 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 19 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to e96ef1a40dda5b637b1911cd950b11e9848de939, d9defbf8b62bde89e206d74c2a2b445b9ed66108, 84371fb58423f997939aacdcbc02d128d76a54e5 or 170d82a57f4be1ce83de823a93bafd218a0d5fb1.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 32b4c8b53ee7799e34a2b1634d32d3ce1e36c44e, < e96ef1a40dda5b637b1911cd950b11e9848de939	Fixed in e96ef1a40dda5b637b1911cd950b11e9848de939
LinuxLinux	Affected ≥ 32b4c8b53ee7799e34a2b1634d32d3ce1e36c44e, < d9defbf8b62bde89e206d74c2a2b445b9ed66108	Fixed in d9defbf8b62bde89e206d74c2a2b445b9ed66108
LinuxLinux	Affected ≥ 32b4c8b53ee7799e34a2b1634d32d3ce1e36c44e, < 84371fb58423f997939aacdcbc02d128d76a54e5	Fixed in 84371fb58423f997939aacdcbc02d128d76a54e5
LinuxLinux	Affected ≥ 32b4c8b53ee7799e34a2b1634d32d3ce1e36c44e, < 170d82a57f4be1ce83de823a93bafd218a0d5fb1	Fixed in 170d82a57f4be1ce83de823a93bafd218a0d5fb1
LinuxLinux	Affected =6.11	Fixed in–

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().

References

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