CVE-2026-90414Network attack vectorHinoki check available

Backing-store corruption via unchecked iSER PDU length

Published Sep 17, 2026 · Updated Sep 18, 2026

Out-of-bounds read in Linux kernel 3.10 and later allows remote authenticated users to corrupt backing storage via a malformed iSER PDU. The isert_recv_done() path forwards PDUs without comparing wc->byte_len to the BHS-declared data length, so handlers copy past a fixed receive descriptor. Exploitation requires a completed iSCSI login and negotiated unsolicited or immediate data; it can expose adjacent heap contents to a SCSI WRITE and crash the kernel, but read-back was not demonstrated.

CVSS severity7.6
High
EPSS probability0.51%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
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Summary

What happened

Out-of-bounds read in Linux kernel 3.10 and later allows remote authenticated users to corrupt backing storage via a malformed iSER PDU. The isert_recv_done() path forwards PDUs without comparing wc->byte_len to the BHS-declared data length, so handlers copy past a fixed receive descriptor. Exploitation requires a completed iSCSI login and negotiated unsolicited or immediate data; it can expose adjacent heap contents to a SCSI WRITE and crash the kernel, but read-back was not demonstrated.

The record

CVE
CVE-2026-90414
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 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=3.10
  2. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <274b1ad7e78338710864c4b4235bb1ce7e7107f9
  3. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <2a6b8f88fb7ee51714a1922a039225bdcaf12855
  4. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <352dc85324b29f5c85876f2666f3158b645e3f18
  5. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <39da0b7e1f530347d284cebcfc5b5afa90a173bf
  6. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <957f92ea4022fb6af4618271615a2a21a7b5bef9
  7. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <b4706722ed3ea72882b3c986a19b4a1ba66384c4
  8. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <bc58e9d3dc560220c57b8bdfc12af0cff1c8a43d
  9. Affected versionversion=b8d26b3be8b33682cf163274ed07479a70554633 <cf36fa5357a2fb25776a568d13a3653da7d99bcb

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=b8d26b3be8b33682cf163274ed07479a70554633 <274b1ad7e78338710864c4b4235bb1ce7e7107f9; version=b8d26b3be8b33682cf163274ed07479a70554633 <2a6b8f88fb7ee51714a1922a039225bdcaf12855; version=b8d26b3be8b33682cf163274ed07479a70554633 <352dc85324b29f5c85876f2666f3158b645e3f18; version=b8d26b3be8b33682cf163274ed07479a70554633 <39da0b7e1f530347d284cebcfc5b5afa90a173bf; version=b8d26b3be8b33682cf163274ed07479a70554633 <957f92ea4022fb6af4618271615a2a21a7b5bef9; version=b8d26b3be8b33682cf163274ed07479a70554633 <b4706722ed3ea72882b3c986a19b4a1ba66384c4; version=b8d26b3be8b33682cf163274ed07479a70554633 <bc58e9d3dc560220c57b8bdfc12af0cff1c8a43d; version=b8d26b3be8b33682cf163274ed07479a70554633 <cf36fa5357a2fb25776a568d13a3653da7d99bcb

Published CVSS scores

7.6Amazon LinuxCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H

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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1210Exploitation of Remote Services

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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