CVE-2026-89846

Kernel memory disclosure via unchecked response length

Published Sep 16, 2026 · Updated Sep 16, 2026

Out-of-bounds read in the qla2xxx SCSI driver in Linux allows attackers to disclose kernel memory through a hostile FCP target. qla2x00_status_entry subtracts an untrusted 32-bit rsp_info_len from the smaller IOCB data-area length, underflowing the limit and advancing sense_data out of bounds before memcpy. Exploitation requires a connected hostile or buggy Fibre Channel target; the read copies up to SCSI_SENSE_BUFFERSIZE bytes of adjacent response-ring or heap memory into the command sense buffer.

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

What happened

Out-of-bounds read in the qla2xxx SCSI driver in Linux allows attackers to disclose kernel memory through a hostile FCP target. qla2x00_status_entry subtracts an untrusted 32-bit rsp_info_len from the smaller IOCB data-area length, underflowing the limit and advancing sense_data out of bounds before memcpy. Exploitation requires a connected hostile or buggy Fibre Channel target; the read copies up to SCSI_SENSE_BUFFERSIZE bytes of adjacent response-ring or heap memory into the command sense buffer.

The record

CVE
CVE-2026-89846
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
adjacent
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=2.6.36
  2. Affected versionversion=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <125b12861c726e58448bb95d55b04851fb131d1f
  3. Affected versionversion=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <6b08c0cb110a1fba92f99d655020198489699815
  4. Affected versionversion=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <be75ab791c9b3baca66c70ce03443afebc83acda
  5. Affected versionversion=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <ca6d880d6c70cb7946e7b3e05d7285f271b6d99e
  6. Affected versionversion=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <d7f7746ff031ae45724881261804f4bf5317c985
  7. Affected versionversion=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <e57ace988bda5693f7b3645f652ea4b4220870ee
  8. Affected versionversion=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <ebc41dfc59d190956e0113e8bd90c28f6f21e8b9
  9. Affected versionversion=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <f6e8977bce887481b2b2b0e2e14a791270741cfb

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.36; version=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <125b12861c726e58448bb95d55b04851fb131d1f; version=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <6b08c0cb110a1fba92f99d655020198489699815; version=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <be75ab791c9b3baca66c70ce03443afebc83acda; version=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <ca6d880d6c70cb7946e7b3e05d7285f271b6d99e; version=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <d7f7746ff031ae45724881261804f4bf5317c985; version=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <e57ace988bda5693f7b3645f652ea4b4220870ee; version=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <ebc41dfc59d190956e0113e8bd90c28f6f21e8b9; version=5544213be7b4fb693730106a6d70a8cc1aa7cdf6 <f6e8977bce887481b2b2b0e2e14a791270741cfb

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)
Vectoradjacent
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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