CVE-2026-90011Network attack vectorHinoki check available

Kernel out-of-bounds read via unterminated login payload

Published Sep 16, 2026 · Updated Sep 16, 2026

Out-of-bounds read in the Linux kernel iSCSI target allows remote attackers to trigger reads past the login buffer through CHAP. An 8,189-to-8,192-byte padded payload fills login->req_buf without a terminator, but CHAP helpers process it with unbounded C-string operations. An unauthenticated initiator can reach this path only when the portal requires CHAP; public evidence establishes no disclosure, code execution, or crash.

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

What happened

Out-of-bounds read in the Linux kernel iSCSI target allows remote attackers to trigger reads past the login buffer through CHAP. An 8,189-to-8,192-byte padded payload fills login->req_buf without a terminator, but CHAP helpers process it with unbounded C-string operations. An unauthenticated initiator can reach this path only when the portal requires CHAP; public evidence establishes no disclosure, code execution, or crash.

The record

CVE
CVE-2026-90011
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1210
Attack vector
network
Privileges
unauthenticated

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=3.1
  2. Affected versionversion=e48354ce078c079996f89d715dfa44814b4eba01 <1624bff4c5118ad494d50ad94d44f22064667a7f
  3. Affected versionversion=e48354ce078c079996f89d715dfa44814b4eba01 <3ddf3ea291a0ef2ea93b82e158960ac2cc42302b
  4. Affected versionversion=e48354ce078c079996f89d715dfa44814b4eba01 <5fac79f248c37774d1dd761406f83d25ca6ff8e4
  5. Affected versionversion=e48354ce078c079996f89d715dfa44814b4eba01 <6b589ef9d5f6cdc70d2b4f269ca6cf26b5ebb076
  6. Affected versionversion=e48354ce078c079996f89d715dfa44814b4eba01 <6ddddcad436d8e6e619204d3c848147ff2f5bf1e
  7. Affected versionversion=e48354ce078c079996f89d715dfa44814b4eba01 <b19dc17ed963ac36c0db4b52a1803fb11169f91f
  8. Affected versionversion=e48354ce078c079996f89d715dfa44814b4eba01 <eb9dadf4d552ebe10644871c5189286552aa48f5
  9. Affected versionversion=e48354ce078c079996f89d715dfa44814b4eba01 <f4825922d2fb371e2b969697d792077f1b62b62c

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.1; version=e48354ce078c079996f89d715dfa44814b4eba01 <1624bff4c5118ad494d50ad94d44f22064667a7f; version=e48354ce078c079996f89d715dfa44814b4eba01 <3ddf3ea291a0ef2ea93b82e158960ac2cc42302b; version=e48354ce078c079996f89d715dfa44814b4eba01 <5fac79f248c37774d1dd761406f83d25ca6ff8e4; version=e48354ce078c079996f89d715dfa44814b4eba01 <6b589ef9d5f6cdc70d2b4f269ca6cf26b5ebb076; version=e48354ce078c079996f89d715dfa44814b4eba01 <6ddddcad436d8e6e619204d3c848147ff2f5bf1e; version=e48354ce078c079996f89d715dfa44814b4eba01 <b19dc17ed963ac36c0db4b52a1803fb11169f91f; version=e48354ce078c079996f89d715dfa44814b4eba01 <eb9dadf4d552ebe10644871c5189286552aa48f5; version=e48354ce078c079996f89d715dfa44814b4eba01 <f4825922d2fb371e2b969697d792077f1b62b62c

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1210Exploitation of Remote Services

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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