CVE-2026-23193Network attack vector

Authenticated kernel compromise via iSCSI session race

Published Feb 14, 2026 · Updated Feb 14, 2026

Use-after-free in the Linux Kernel iSCSI target allows remote authenticated users to crash or compromise the kernel through session teardown. iscsit_dec_session_usage_count() calls complete() before releasing session_usage_lock, allowing the awakened waiter to free the session before spin_unlock_bh() dereferences it. CHAP- or ACL-authenticated iSCSI initiator access is required; exploitation can expose or alter kernel memory or force a kernel crash.

CVSS severity8.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Kernel iSCSI target allows remote authenticated users to crash or compromise the kernel through session teardown. iscsit_dec_session_usage_count() calls complete() before releasing session_usage_lock, allowing the awakened waiter to free the session before spin_unlock_bh() dereferences it. CHAP- or ACL-authenticated iSCSI initiator access is required; exploitation can expose or alter kernel memory or force a kernel crash.

The record

CVE
CVE-2026-23193
Published
Feb 14, 2026
Updated
Feb 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1210, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <11ebafffce31efc6abeb28c509017976fc49f1ca
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2b64015550a13bcc72910be0565548d9a754d46d
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <41b86a9ec037bd3435d68dd3692f0891a207e7e7
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4530f4e4d0e6a207110b0ffed0c911bca43531a4
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <84dc6037390b8607c5551047d3970336cb51ba9a
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d8dbdc146e9e9a976931b78715be2e91299049f9
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fd8b0900173307039d3a84644c2fee041a7ed4fb

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <11ebafffce31efc6abeb28c509017976fc49f1ca; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2b64015550a13bcc72910be0565548d9a754d46d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <41b86a9ec037bd3435d68dd3692f0891a207e7e7; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4530f4e4d0e6a207110b0ffed0c911bca43531a4; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <84dc6037390b8607c5551047d3970336cb51ba9a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d8dbdc146e9e9a976931b78715be2e91299049f9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fd8b0900173307039d3a84644c2fee041a7ed4fb

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1210Exploitation of Remote Services
T1499Endpoint Denial of Service

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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