CVE-2026-89857

Command duplication or loss via unlocked NVMe rejects

Published Sep 16, 2026 · Updated Sep 16, 2026

Race condition in the Linux kernel 6.6 qla2xxx driver allows attackers to duplicate or drop commands during concurrent NVMe-FC activity. Two callers invoke qla_nvme_ls_reject_iocb without holding hardware_lock, allowing request-ring allocation and doorbell updates to race with normal I/O. Exploitation requires the qla2xxx NVMe-FC path and concurrent reject and submission activity; corrupted producer state can misdirect storage operations.

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

Race condition in the Linux kernel 6.6 qla2xxx driver allows attackers to duplicate or drop commands during concurrent NVMe-FC activity. Two callers invoke qla_nvme_ls_reject_iocb without holding hardware_lock, allowing request-ring allocation and doorbell updates to race with normal I/O. Exploitation requires the qla2xxx NVMe-FC path and concurrent reject and submission activity; corrupted producer state can misdirect storage operations.

The record

CVE
CVE-2026-89857
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?

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  1. Affected versionversion=6.6
  2. Affected versionversion=875386b98857822b77ac7f95bdf367b70af5b78c <11834e5773e20fd3742d7eb900876e66b9e7d029
  3. Affected versionversion=875386b98857822b77ac7f95bdf367b70af5b78c <7eb618877503edbf17aa65e357a81bda1fc8f163
  4. Affected versionversion=875386b98857822b77ac7f95bdf367b70af5b78c <b02ff132017b28222187ebcf95ce7f4cb576cd36
  5. Affected versionversion=875386b98857822b77ac7f95bdf367b70af5b78c <b3a362466db6b8ec47cc537ac641ac197fa69b5d
  6. Affected versionversion=875386b98857822b77ac7f95bdf367b70af5b78c <f743488e4a203049f27ec5d8cd0caccc483af01e

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=875386b98857822b77ac7f95bdf367b70af5b78c <11834e5773e20fd3742d7eb900876e66b9e7d029; version=875386b98857822b77ac7f95bdf367b70af5b78c <7eb618877503edbf17aa65e357a81bda1fc8f163; version=875386b98857822b77ac7f95bdf367b70af5b78c <b02ff132017b28222187ebcf95ce7f4cb576cd36; version=875386b98857822b77ac7f95bdf367b70af5b78c <b3a362466db6b8ec47cc537ac641ac197fa69b5d; version=875386b98857822b77ac7f95bdf367b70af5b78c <f743488e4a203049f27ec5d8cd0caccc483af01e

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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