CVE-2026-89859Hinoki check available

Kernel heap disclosure via uninitialized diagnostics fields

Published Sep 16, 2026 · Updated Sep 16, 2026

Information disclosure in the qla2xxx SCSI driver in Linux 4.8 and later allows local users to read kernel heap data via D_Port diagnostics. qla2x00_do_dport_diagnostics() allocates a nonzeroed response, partially fills it from the request, then copies uninitialized options and unused fields to user space. Reachability requires local access to the qla2xxx D_Port diagnostics interface and compatible Fibre Channel hardware; exposure is limited to residual kernel heap contents.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in the qla2xxx SCSI driver in Linux 4.8 and later allows local users to read kernel heap data via D_Port diagnostics. qla2x00_do_dport_diagnostics() allocates a nonzeroed response, partially fills it from the request, then copies uninitialized options and unused fields to user space. Reachability requires local access to the qla2xxx D_Port diagnostics interface and compatible Fibre Channel hardware; exposure is limited to residual kernel heap contents.

The record

CVE
CVE-2026-89859
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.8
  2. Affected versionversion=ec89146215d124c429bff84b498dccdc4919ffa7 <9fc03be982763a131913f84fe73b240ae45bca37
  3. Affected versionversion=ec89146215d124c429bff84b498dccdc4919ffa7 <a152edab3854f01dd2daf3eaf8f32cbabdb3834e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=ec89146215d124c429bff84b498dccdc4919ffa7 <9fc03be982763a131913f84fe73b240ae45bca37; version=ec89146215d124c429bff84b498dccdc4919ffa7 <a152edab3854f01dd2daf3eaf8f32cbabdb3834e

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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