CVE-2026-89847

Kernel memory corruption via async IOCB double completion

Published Sep 16, 2026 · Updated Sep 16, 2026

A use-after-free in the Linux kernel qla2xxx SCSI driver allows attackers to corrupt kernel memory during an async IOCB timeout race. qla2x00_async_iocb_timeout() calls sp->done() after a response ISR has already removed and completed the same SRB, so complete() can target a reclaimed stack frame. The race requires the qla2xxx path, a timed-out asynchronous IOCB, a failed abort, and competing ISR completion; the documented consequence is kernel memory corruption.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

A use-after-free in the Linux kernel qla2xxx SCSI driver allows attackers to corrupt kernel memory during an async IOCB timeout race. qla2x00_async_iocb_timeout() calls sp->done() after a response ISR has already removed and completed the same SRB, so complete() can target a reclaimed stack frame. The race requires the qla2xxx path, a timed-out asynchronous IOCB, a failed abort, and competing ISR completion; the documented consequence is kernel memory corruption.

The record

CVE
CVE-2026-89847
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

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=4.19
  2. Affected versionversion=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <6e217a9482eabbd8b29847be334c74cf468d3544
  3. Affected versionversion=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <71a7b6e3c7f121439f51a058e53d4a8e05b63dec
  4. Affected versionversion=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <7257b5e1fb6c9387714f66e01b79ec82b717eede
  5. Affected versionversion=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <845d4abd92cd2f97551356c8b281ad6e197acb07
  6. Affected versionversion=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <9fa1d71233a82416492d9c9de9756ebe140fe714
  7. Affected versionversion=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8
  8. Affected versionversion=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <d6d856c722f40f0694ff755208552e658db6dd42
  9. Affected versionversion=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <f5b660e0b0d9190d8853c795c2522cc5f8c93003

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <6e217a9482eabbd8b29847be334c74cf468d3544; version=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <71a7b6e3c7f121439f51a058e53d4a8e05b63dec; version=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <7257b5e1fb6c9387714f66e01b79ec82b717eede; version=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <845d4abd92cd2f97551356c8b281ad6e197acb07; version=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <9fa1d71233a82416492d9c9de9756ebe140fe714; version=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <bb45bc4bd53c95a7bf6f782577b5ede94c0f8aa8; version=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <d6d856c722f40f0694ff755208552e658db6dd42; version=f6145e86d21fccd59bbb87bc1e1eb076658fd79a <f5b660e0b0d9190d8853c795c2522cc5f8c93003

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

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
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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