VulnerabilityPublished 4 Feb 2026Updated 19 Oct 2026

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

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e206fb415db36bad52bb90c08d46ce71ffbe8a80 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:42 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS

0.1% chance of exploitation in 30 days – higher than 3% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-06-10.

Patch

Available – fixed in e206fb415db36bad52bb90c08d46ce71ffbe8a80, 8215794403d264739cc676668087512950b2ff31, 31410a01a86bcb98c798d01061abf1f789c4f75a +4

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 95046b927a54f461766f83a212c6a93bc5fd2e67, < e206fb415db36bad52bb90c08d46ce71ffbe8a80	Fixed in e206fb415db36bad52bb90c08d46ce71ffbe8a80
LinuxLinux	Affected ≥ 95046b927a54f461766f83a212c6a93bc5fd2e67, < 8215794403d264739cc676668087512950b2ff31	Fixed in 8215794403d264739cc676668087512950b2ff31
LinuxLinux	Affected ≥ 95046b927a54f461766f83a212c6a93bc5fd2e67, < 31410a01a86bcb98c798d01061abf1f789c4f75a	Fixed in 31410a01a86bcb98c798d01061abf1f789c4f75a
LinuxLinux	Affected ≥ 95046b927a54f461766f83a212c6a93bc5fd2e67, < 92c6dc181a18e6e0ddb872ed35cb48a9274829e4	Fixed in 92c6dc181a18e6e0ddb872ed35cb48a9274829e4
LinuxLinux	Affected ≥ 95046b927a54f461766f83a212c6a93bc5fd2e67, < 47ffb4dcffe336f4a7bd0f3284be7aadc6484698	Fixed in 47ffb4dcffe336f4a7bd0f3284be7aadc6484698
LinuxLinux	Affected ≥ 95046b927a54f461766f83a212c6a93bc5fd2e67, < 6c3e00888dbec887125a08b51a705b9b163fcdd1	Fixed in 6c3e00888dbec887125a08b51a705b9b163fcdd1

Description

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.

CWE-476NULL Pointer Dereference (opens in a new tab)
Base weaknessLikelihood of exploit: MediumCWE Top 25 (2025): #13OWASP Top 10 A10:2025: Mishandling of Exceptional Conditions (opens in a new tab)
The product dereferences a pointer that it expects to be valid but is NULL.
Implementation
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
Requirements
Select a programming language that is not susceptible to these issues.
Implementation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
OWASP Cheat Sheets
Logging (opens in a new tab)
Error Handling (opens in a new tab)
OWASP ASVS 4.0.3
V11.1.7 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

WeaknessesCWE-476

Technical details

References

Community reviews

Related threats