CVE-2026-98479Network attack vector

Data corruption via unchecked iSCSI Data-In direction

Published Oct 18, 2026 · Updated Oct 18, 2026

Data corruption in Linux libiscsi_tcp allows remote attackers to overwrite write buffers via crafted iSCSI Data-In responses. The Data-In branch of iscsi_tcp_hdr_dissect() copies received data into a command's scatterlist without verifying that the command reads from the device. Exploitation requires control of responses from a connected iSCSI target during a write, corrupting pinned application buffers or page-cache contents while write operations report success.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Data corruption in Linux libiscsi_tcp allows remote attackers to overwrite write buffers via crafted iSCSI Data-In responses. The Data-In branch of iscsi_tcp_hdr_dissect() copies received data into a command's scatterlist without verifying that the command reads from the device. Exploitation requires control of responses from a connected iSCSI target during a write, corrupting pinned application buffers or page-cache contents while write operations report success.

The record

CVE
CVE-2026-98479
Published
Oct 18, 2026
Updated
Oct 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1565.001
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 18, 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=2.6.29
  2. Affected versionversion=a081c13e39b5c17052a7b46fafa61019c4c110ff <24ffc919467d20951f0f132d1c75294e2e91e09b
  3. Affected versionversion=a081c13e39b5c17052a7b46fafa61019c4c110ff <79991b770fc3685b1d5cf805b659a879edd19931
  4. Affected versionversion=a081c13e39b5c17052a7b46fafa61019c4c110ff <8db1232945bc663fb94f300090a1fc108de99296
  5. Affected versionversion=a081c13e39b5c17052a7b46fafa61019c4c110ff <94e5bdd08e51c450d954bc592f591c233ca5c9df
  6. Affected versionversion=a081c13e39b5c17052a7b46fafa61019c4c110ff <bce07e2f37b5e4a427d36fd6b1c14067b27591db
  7. Affected versionversion=a081c13e39b5c17052a7b46fafa61019c4c110ff <de96dc11aee0d058927bff94a168e3c5c46483e2
  8. Affected versionversion=a081c13e39b5c17052a7b46fafa61019c4c110ff <e3b25bf2cf2496e85bc05b33360faf9fdf880e03
  9. Affected versionversion=a081c13e39b5c17052a7b46fafa61019c4c110ff <ee56b5e18f566c0b5a183379dcd63d402cebf2f8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.29; version=a081c13e39b5c17052a7b46fafa61019c4c110ff <24ffc919467d20951f0f132d1c75294e2e91e09b; version=a081c13e39b5c17052a7b46fafa61019c4c110ff <79991b770fc3685b1d5cf805b659a879edd19931; version=a081c13e39b5c17052a7b46fafa61019c4c110ff <8db1232945bc663fb94f300090a1fc108de99296; version=a081c13e39b5c17052a7b46fafa61019c4c110ff <94e5bdd08e51c450d954bc592f591c233ca5c9df; version=a081c13e39b5c17052a7b46fafa61019c4c110ff <bce07e2f37b5e4a427d36fd6b1c14067b27591db; version=a081c13e39b5c17052a7b46fafa61019c4c110ff <de96dc11aee0d058927bff94a168e3c5c46483e2; version=a081c13e39b5c17052a7b46fafa61019c4c110ff <e3b25bf2cf2496e85bc05b33360faf9fdf880e03; version=a081c13e39b5c17052a7b46fafa61019c4c110ff <ee56b5e18f566c0b5a183379dcd63d402cebf2f8

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1565.001Stored Data Manipulation

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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