CVE-2026-23084

System crash via NULL PMAC_ID write

Published Feb 4, 2026 · Updated Feb 4, 2026

NULL pointer dereference in Linux Kernel 3.12 through 6.19-rc6 allows local users to crash the system via the be2net driver. The be2net call site passes pmac_id_valid as false and pmac_id as NULL, so be_cmd_get_mac_from_list writes a firmware-returned PMAC_ID through a NULL pointer. Reachability requires an Emulex be2net network adapter and firmware that supplies the PMAC_ID; the documented consequence is availability loss without data exposure or modification.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux Kernel 3.12 through 6.19-rc6 allows local users to crash the system via the be2net driver. The be2net call site passes pmac_id_valid as false and pmac_id as NULL, so be_cmd_get_mac_from_list writes a firmware-returned PMAC_ID through a NULL pointer. Reachability requires an Emulex be2net network adapter and firmware that supplies the PMAC_ID; the documented consequence is availability loss without data exposure or modification.

The record

CVE
CVE-2026-23084
Published
Feb 4, 2026
Updated
Feb 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 4, 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=3.12
  2. Affected versionversion=95046b927a54f461766f83a212c6a93bc5fd2e67 <31410a01a86bcb98c798d01061abf1f789c4f75a
  3. Affected versionversion=95046b927a54f461766f83a212c6a93bc5fd2e67 <47ffb4dcffe336f4a7bd0f3284be7aadc6484698
  4. Affected versionversion=95046b927a54f461766f83a212c6a93bc5fd2e67 <8215794403d264739cc676668087512950b2ff31
  5. Affected versionversion=95046b927a54f461766f83a212c6a93bc5fd2e67 <e206fb415db36bad52bb90c08d46ce71ffbe8a80

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.12; version=95046b927a54f461766f83a212c6a93bc5fd2e67 <31410a01a86bcb98c798d01061abf1f789c4f75a; version=95046b927a54f461766f83a212c6a93bc5fd2e67 <47ffb4dcffe336f4a7bd0f3284be7aadc6484698; version=95046b927a54f461766f83a212c6a93bc5fd2e67 <8215794403d264739cc676668087512950b2ff31; version=95046b927a54f461766f83a212c6a93bc5fd2e67 <e206fb415db36bad52bb90c08d46ce71ffbe8a80

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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