CVE-2026-89855 - Vulnerability Details

- scsi: qla2xxx: Serialize flash version read in reset handler

Description

In the Linux kernel, the following vulnerability has been resolved:

scsi: qla2xxx: Serialize flash version read in reset handler

The "update cache versions without reset" sysfs reset operation (0x20261)
calls get_flash_version(), which reads hardware flash registers, without
holding ha->optrom_mutex. The VPD update path serializes the same call
under optrom_mutex, so this reset path can interleave its flash register
accesses with a concurrent VPD or optrom flash operation and corrupt the
reads.

Hold ha->optrom_mutex across the get_flash_version() call to match the
VPD update path.

Published: 2026-09-16

Score: n/a

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

During a sysfs reset operation the qla2xxx driver calls the get_flash_version() function without holding the optrom_mutex. The same mutex is used in the VPD update path during flash operations. When these two paths run concurrently, their flash register accesses can interleave, producing corrupted read data. The flaw is a classic data race that leads to inconsistent flash version readings.

Affected Systems

Any Linux kernel distribution that includes the qla2xxx SCSI driver is potentially affected, provided the kernel has not been updated with the patch that serializes the flash version read. No specific version numbers are disclosed, but the fix is available in recent kernel commits as referenced.

Risk and Exploitability

The EPSS score is below 1%, and the vulnerability is not listed in the CISA KEV catalog. No CVSS score is reported. The attack vector requires simultaneous access to the reset sysfs entry and a VPD or optrom flash operation, which limits remote exploitation possibilities. Overall, the risk of successful exploitation is low given the narrow surface and lack of public exploits.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`8c2cf7d4e387d003259488522523807f25576427`	affected	< f1fc052f2a5890ea6dba80d50254dd6258b13386
`8c2cf7d4e387d003259488522523807f25576427`	affected	< 31bf2714abbb0aa5a8a03d15038f8920e1c74b21
`8c2cf7d4e387d003259488522523807f25576427`	affected	< ae979c549cba684e67b6c047140f3a8d2439b298
`8c2cf7d4e387d003259488522523807f25576427`	affected	< 9cef42a073a0bdeee7fb1b47221cda222d330d2a
`8c2cf7d4e387d003259488522523807f25576427`	affected	< 75460967619eda720c9a03767729157ffd171d8c
`8c2cf7d4e387d003259488522523807f25576427`	affected	< 8d116137119371349fb09685fe05413d8fc92efe
`8c2cf7d4e387d003259488522523807f25576427`	affected	< 33735490789e5417851752974c0b1d23125559cd
`8c2cf7d4e387d003259488522523807f25576427`	affected	< f606ed93de0c4f1e7e3618779e9fad731455314a

Linux

affected

Version	Status	Constraints
`3.12`	affected	—
`0`	unaffected	< 3.12
`5.10.270`	unaffected	≤ 5.10.*
`5.15.221`	unaffected	≤ 5.15.*
`6.1.188`	unaffected	≤ 6.1.*
`6.6.157`	unaffected	≤ 6.6.*
`6.12.110`	unaffected	≤ 6.12.*
`6.18.51`	unaffected	≤ 6.18.*
`7.2.5`	unaffected	≤ 7.2.*
`7.3-rc1`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[8c2cf7d4e387d003259488522523807f25576427,f1fc052f2a5890ea6dba80d50254dd6258b13386)`	affected	code_commit	—
`[8c2cf7d4e387d003259488522523807f25576427,31bf2714abbb0aa5a8a03d15038f8920e1c74b21)`	affected	code_commit	—
`[8c2cf7d4e387d003259488522523807f25576427,ae979c549cba684e67b6c047140f3a8d2439b298)`	affected	code_commit	—
`[8c2cf7d4e387d003259488522523807f25576427,9cef42a073a0bdeee7fb1b47221cda222d330d2a)`	affected	code_commit	—
`[8c2cf7d4e387d003259488522523807f25576427,75460967619eda720c9a03767729157ffd171d8c)`	affected	code_commit	—
`[8c2cf7d4e387d003259488522523807f25576427,8d116137119371349fb09685fe05413d8fc92efe)`	affected	code_commit	—
`[8c2cf7d4e387d003259488522523807f25576427,33735490789e5417851752974c0b1d23125559cd)`	affected	code_commit	—
`[8c2cf7d4e387d003259488522523807f25576427,f606ed93de0c4f1e7e3618779e9fad731455314a)`	affected	code_commit	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`3.12`	affected	generic	—
`[0,3.12)`	unaffected	generic	—
`[5.10.270,5.11.0)`	unaffected	semver	—
`[5.15.221,5.16.0)`	unaffected	semver	—
`[6.1.188,6.2.0)`	unaffected	semver	—
`[6.6.157,6.7.0)`	unaffected	semver	—
`[6.12.110,6.13.0)`	unaffected	semver	—
`[6.18.51,6.19.0)`	unaffected	semver	—
`[7.2.5,7.3.0)`	unaffected	semver	—
`[7.3-rc1,*]`	unaffected	generic	—

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Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Apply the kernel patch that serializes the flash version read by adding optrom_mutex locking around the get_flash_version() call, as available in the referenced kernel commits.
If you compile a custom kernel or module, rebuild the qla2xxx driver after integrating the updated source code to ensure the mutex protection is present.
As a temporary precaution, avoid initiating VPD or optrom flash operations while performing a device reset until the kernel is updated.

Generated by OpenCVE AI on September 18, 2026 at 09:03 UTC.

Tracking

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Advisories

Source	ID	Title
Debian DLA	DLA-4817-1	linux-6.12 security update
Debian DSA	DSA-6528-1	linux security update

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.0022.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/31bf2714abbb0aa5a8a03d15038f8920e1c74b21
https://git.kernel.org/stable/c/33735490789e5417851752974c0b1d23125559cd
https://git.kernel.org/stable/c/75460967619eda720c9a03767729157ffd171d8c
https://git.kernel.org/stable/c/8d116137119371349fb09685fe05413d8fc92efe
https://git.kernel.org/stable/c/9cef42a073a0bdeee7fb1b47221cda222d330d2a
https://git.kernel.org/stable/c/ae979c549cba684e67b6c047140f3a8d2439b298
https://git.kernel.org/stable/c/f1fc052f2a5890ea6dba80d50254dd6258b13386
https://git.kernel.org/stable/c/f606ed93de0c4f1e7e3618779e9fad731455314a

History

Fri, 18 Sep 2026 09:30:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-362

Wed, 16 Sep 2026 10:45:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Serialize flash version read in reset handler The "update cache versions without reset" sysfs reset operation (0x20261) calls get_flash_version(), which reads hardware flash registers, without holding ha->optrom_mutex. The VPD update path serializes the same call under optrom_mutex, so this reset path can interleave its flash register accesses with a concurrent VPD or optrom flash operation and corrupt the reads. Hold ha->optrom_mutex across the get_flash_version() call to match the VPD update path.
Title		scsi: qla2xxx: Serialize flash version read in reset handler
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/31bf2714abbb0aa5a8a03d15038f8920e1c74b21 https://git.kernel.org/stable/c/33735490789e5417851752974c0b1d23125559cd https://git.kernel.org/stable/c/75460967619eda720c9a03767729157ffd171d8c https://git.kernel.org/stable/c/8d116137119371349fb09685fe05413d8fc92efe https://git.kernel.org/stable/c/9cef42a073a0bdeee7fb1b47221cda222d330d2a https://git.kernel.org/stable/c/ae979c549cba684e67b6c047140f3a8d2439b298 https://git.kernel.org/stable/c/f1fc052f2a5890ea6dba80d50254dd6258b13386 https://git.kernel.org/stable/c/f606ed93de0c4f1e7e3618779e9fad731455314a

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-09-16T10:31:28.836Z

Updated: 2026-09-16T10:31:28.836Z

Reserved: 2026-09-11T19:38:34.771Z

Link: CVE-2026-89855

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-09-16T11:16:53.313

Modified: 2026-09-16T11:16:53.313

Link: CVE-2026-89855

Redhat

No data.

OpenCVE Enrichment

Updated: 2026-09-18T09:15:06Z

Weaknesses

CWE-362
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Impact

Affected Systems

Risk and Exploitability

Tracking

Subscriptions

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