CVE-2026-89850Hinoki check available

Adapter hang via unsynchronized firmware-state query

Published Sep 16, 2026 · Updated Sep 16, 2026

Race condition in Linux allows local users to hang a QLogic adapter by reading firmware state from sysfs during chip recovery. qla2x00_fw_state_show() bypasses chip-down and EEH-busy guards by issuing a second firmware-state mailbox command outside optrom_mutex after its guarded path fails. Reachability requires a qla2xxx-supported adapter and a sysfs read during ISP reset or PCI error recovery; the resulting hang interrupts adapter service.

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

Race condition in Linux allows local users to hang a QLogic adapter by reading firmware state from sysfs during chip recovery. qla2x00_fw_state_show() bypasses chip-down and EEH-busy guards by issuing a second firmware-state mailbox command outside optrom_mutex after its guarded path fails. Reachability requires a qla2xxx-supported adapter and a sysfs read during ISP reset or PCI error recovery; the resulting hang interrupts adapter service.

The record

CVE
CVE-2026-89850
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
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=4.20
  2. Affected versionversion=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <178d984e8875292582e4295cf559b2b11d3c9325
  3. Affected versionversion=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <22f44f77da496bc355479c08a0a9dbc9ad42ba42
  4. Affected versionversion=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <7bc2baed8a3d6a1e2a3f6b78d245f25d1e18a749
  5. Affected versionversion=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <a194684853dceaa1d6b7a9a02bc12f479232ad9b
  6. Affected versionversion=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <a6374b508893de15fee78583a95f5099d7812e85
  7. Affected versionversion=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <b6a30baa29695fa0eaba4a3a04435a3c1a5cb63d
  8. Affected versionversion=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <cba780c01f72f8585ca81ad7304097f8b12ef339
  9. Affected versionversion=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <e0cebe20dcffbed9c078fe30e2d18cd5046d9eff

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.20; version=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <178d984e8875292582e4295cf559b2b11d3c9325; version=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <22f44f77da496bc355479c08a0a9dbc9ad42ba42; version=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <7bc2baed8a3d6a1e2a3f6b78d245f25d1e18a749; version=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <a194684853dceaa1d6b7a9a02bc12f479232ad9b; version=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <a6374b508893de15fee78583a95f5099d7812e85; version=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <b6a30baa29695fa0eaba4a3a04435a3c1a5cb63d; version=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <cba780c01f72f8585ca81ad7304097f8b12ef339; version=b6faaaf796d7bfb00e32ca5c905d55cc43e89448 <e0cebe20dcffbed9c078fe30e2d18cd5046d9eff

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

T1499.004Application or System Exploitation

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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