CVE-2026-89858

Kernel stack disclosure via unbounded image count

Published Sep 16, 2026 · Updated Sep 16, 2026

Out-of-bounds read in Linux qla2xxx allows local users to disclose kernel stack data through a crafted BSG FRU-version request. qla2x00_update_fru_versions() copies the request into a 256-byte stack buffer but trusts list->count, so more than six entries advances beyond the buffer and passes adjacent stack bytes to qla2x00_write_sfp(). Exploitation requires permission to submit the BSG request to a system using the qla2xxx driver and a compatible adapter; the disclosed bytes are sent to that device.

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

Out-of-bounds read in Linux qla2xxx allows local users to disclose kernel stack data through a crafted BSG FRU-version request. qla2x00_update_fru_versions() copies the request into a 256-byte stack buffer but trusts list->count, so more than six entries advances beyond the buffer and passes adjacent stack bytes to qla2x00_write_sfp(). Exploitation requires permission to submit the BSG request to a system using the qla2xxx driver and a compatible adapter; the disclosed bytes are sent to that device.

The record

CVE
CVE-2026-89858
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1005
Attack vector
local
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=3.2
  2. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <047f1f7ee6f85bde28abfdda9fa550191ddc0532
  3. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <7b22b4cb8822805cef7ba618da6f76e1474d68bd
  4. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <7e3154c97ec15460f715dbbe4097c255cce110b1
  5. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <a9706d5e754e77515a92bb532bd0d73644979a1f
  6. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <af733bbfcf667af1871a2735fba2835b0da71efb
  7. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <de62cf265dbe309f34f144a6cdbca9240317727e
  8. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <f2d4f025b67fcbfb2bbbadd3b5a6a43c4b436514
  9. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <f93e8039e6fd54a3c027c6184daf00b745b576a0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.2; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <047f1f7ee6f85bde28abfdda9fa550191ddc0532; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <7b22b4cb8822805cef7ba618da6f76e1474d68bd; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <7e3154c97ec15460f715dbbe4097c255cce110b1; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <a9706d5e754e77515a92bb532bd0d73644979a1f; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <af733bbfcf667af1871a2735fba2835b0da71efb; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <de62cf265dbe309f34f144a6cdbca9240317727e; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <f2d4f025b67fcbfb2bbbadd3b5a6a43c4b436514; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <f93e8039e6fd54a3c027c6184daf00b745b576a0

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1005Data from Local System

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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