CVE-2026-89843

Kernel-stack disclosure via short qla2xxx BSG requests

Published Sep 16, 2026 · Updated Sep 16, 2026

Information disclosure in Linux qla2xxx BSG handlers allows local users to read stale kernel stack data through short requests. Several handlers copy a short request into an uninitialized 256-byte bsg stack buffer, and qla2x00_read_fru_status() and qla2x00_read_i2c() return the entire structure. Access to the affected qla2xxx BSG device and compatible adapter is required; returned padding exposes residual kernel-stack contents.

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

Information disclosure in Linux qla2xxx BSG handlers allows local users to read stale kernel stack data through short requests. Several handlers copy a short request into an uninitialized 256-byte bsg stack buffer, and qla2x00_read_fru_status() and qla2x00_read_i2c() return the entire structure. Access to the affected qla2xxx BSG device and compatible adapter is required; returned padding exposes residual kernel-stack contents.

The record

CVE
CVE-2026-89843
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
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 <1c820d0900e4aacd5020b989159f6b4b2f7d0d6a
  3. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <26bc6a2c235a70bfc9b6de412600208aca820e20
  4. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <4fe5790674097897a1af1367d1e384f7e5a62fb7
  5. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <5ab32dff910291b5e6bf6223f8a4003536c1800a
  6. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <708c0ec1e09c52fee24b74ce9398bf3f8d1c83fd
  7. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <7881faf862ee301ecfe3adc0725bd2fa0021cd95
  8. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <947c6bfcf7f5ec924995bec43e3108b98c75b44e
  9. Affected versionversion=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <b93d3bb3afe1b44489927de1eb4e66e8536a5935

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.2; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <1c820d0900e4aacd5020b989159f6b4b2f7d0d6a; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <26bc6a2c235a70bfc9b6de412600208aca820e20; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <4fe5790674097897a1af1367d1e384f7e5a62fb7; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <5ab32dff910291b5e6bf6223f8a4003536c1800a; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <708c0ec1e09c52fee24b74ce9398bf3f8d1c83fd; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <7881faf862ee301ecfe3adc0725bd2fa0021cd95; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <947c6bfcf7f5ec924995bec43e3108b98c75b44e; version=697a4bc69159c3396035b0506ffa55c4b2d0b1f4 <b93d3bb3afe1b44489927de1eb4e66e8536a5935

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

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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