LiveActive security incident?Get immediate response
CVE Record

CVE-2026-23084: be2net: Fix NULL pointer dereference in be_cmd_get_mac_from_list

In the Linux kernel, the following vulnerability has been resolved: be2net: Fix NULL pointer dereference in be_cmd_get_mac_from_list When the parameter pmac_id_valid argument of be_cmd_get_mac_from_list() is set to false, the driver may request the PMAC_ID from the firmware of the network card, and this function will store that PMAC_ID at the provided address pmac_id. This is the contract of this function. However, there is a location within the driver where both pmac_id_valid == false and pmac_id == NULL are being passed. This could result in dereferencing a NULL pointer. To resolve this issue, it is necessary to pass the address of a stub variable to the function.

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2026-23084 is a Linux kernel be2net network driver bug that can dereference a NULL pointer when retrieving a MAC-related identifier from network-card firmware. The public record does not provide CVSS, confirmed impact severity, or exploitation evidence. Treat it as a kernel stability risk until your Linux vendor maps it to affected builds.

Executive priority

Do not treat this as an emergency without vendor-specific exposure evidence. Assign normal kernel patch management priority, with faster handling for infrastructure using be2net hardware or Siemens products referencing the advisory.

Technical view

The flaw is in be_cmd_get_mac_from_list(). One call path passes pmac_id_valid=false while also passing pmac_id=NULL, violating the function contract when firmware returns a PMAC_ID. The published fix passes the address of a stub variable instead. The source bundle identifies Linux kernel versions/branches and multiple stable commit references.

Likely exposure

Exposure appears limited to Linux systems running affected kernels where the be2net driver path is present and relevant network hardware or firmware interaction is used. The bundle does not identify affected distributions, cloud images, appliances, or exact fixed package versions.

Exploitation context

No active exploitation is cited, and the CVE is not listed as KEV in the provided bundle. The public description supports a possible kernel NULL pointer dereference, but does not describe remote reachability, privilege requirements, or a working exploit path.

Researcher notes

Evidence is narrow: the CVE text describes the faulty argument combination and the stub-variable fix, but lacks CVSS, CWE, exploitability analysis, and distribution mappings. Validate through source commits and vendor kernels rather than assuming all Linux deployments are reachable.

Mitigation direction

  • Apply Linux kernel or distribution updates that include the referenced stable fixes.
  • Check your Linux vendor advisory for exact affected and fixed package versions.
  • Review Siemens SSA-019113 if Siemens products are in your environment.
  • Prioritize systems using the be2net driver or matching network adapters.

Validation and detection

  • Inventory Linux kernel versions against vendor advisories and the CVE record.
  • Check whether the be2net driver is loaded or packaged on exposed systems.
  • Confirm remediation by verifying the vendor-fixed kernel package is installed.
  • Track Siemens advisory applicability for managed industrial or appliance assets.
Prepared
Confidence
medium
Sources
10

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2026-23084 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
2ADP providers
9Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux95046b927a54f461766f83a212c6a93bc5fd2e67, 95046b927a54f461766f83a212c6a93bc5fd2e67, 95046b927a54f461766f83a212c6a93bc5fd2e67, 95046b927a54f461766f83a212c6a93bc5fd2e67, 95046b927a54f461766f83a212c6a93bc5fd2e67, 95046b927a54f461766f83a212c6a93bc5fd2e67, 95046b927a54f461766f83a212c6a93bc5fd2e67unaffected
LinuxLinux3.12, 0, 5.10.249, 5.15.199, 6.1.162, 6.6.122, 6.12.68, 6.18.8, 6.19affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.