CVE-2026-89480Network attack vector

Stale page disclosure via unchecked short reads

Published Sep 11, 2026 · Updated Sep 11, 2026

Information disclosure in the Linux NVMe/TCP host driver allows remote attackers controlling a storage target to expose stale page data via short reads. The nvme_tcp_recv_data() path completes a read after consuming the current C2HData PDU without comparing accumulated bytes with the request length. A host must read from an attacker-controlled NVMe/TCP controller; a 512-byte reply to a 4096-byte request can expose 3584 bytes already present in the destination page.

CVSS severityUnavailable
Unscored
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the Linux NVMe/TCP host driver allows remote attackers controlling a storage target to expose stale page data via short reads. The nvme_tcp_recv_data() path completes a read after consuming the current C2HData PDU without comparing accumulated bytes with the request length. A host must read from an attacker-controlled NVMe/TCP controller; a 512-byte reply to a 4096-byte request can expose 3584 bytes already present in the destination page.

The record

CVE
CVE-2026-89480
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=3f2304f8c6d6ed97849057bd16fee99e434ca796 <7fa3f73f6c8ddc5f0425b50fb2a626a782ef7d12
  2. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <832a685efeb5d925ee7d30011d2dbe45f81447a3
  3. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <8a02ad98798fd01f51f648c1fdd8f3c9d07195d3
  4. Affected versionversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <99066cf9bba175f610ceb61a35f6fc9fbc33ff65
  5. Affected versionversion=5.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3f2304f8c6d6ed97849057bd16fee99e434ca796 <7fa3f73f6c8ddc5f0425b50fb2a626a782ef7d12; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <832a685efeb5d925ee7d30011d2dbe45f81447a3; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <8a02ad98798fd01f51f648c1fdd8f3c9d07195d3; version=3f2304f8c6d6ed97849057bd16fee99e434ca796 <99066cf9bba175f610ceb61a35f6fc9fbc33ff65; version=5.0

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
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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