CVE-2024-26942

Local kernel panic via uninitialized AT8031 private data

Published May 1, 2024 · Updated May 11, 2026

NULL pointer dereference in the Linux kernel 6.8 allows local users to trigger a kernel panic through the AT8031 PHY probe path. The at8031_probe path writes is_1000basex and is_fiber through priv before at803x_probe allocates that structure in phydev. Reachability requires local low-privileged access and an AT8031 PHY, and successful triggering interrupts the affected system by panicking its kernel.

CVSS severity5.5
Medium
EPSS probability0.15%
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 the Linux kernel 6.8 allows local users to trigger a kernel panic through the AT8031 PHY probe path. The at8031_probe path writes is_1000basex and is_fiber through priv before at803x_probe allocates that structure in phydev. Reachability requires local low-privileged access and an AT8031 PHY, and successful triggering interrupts the affected system by panicking its kernel.

The record

CVE
CVE-2024-26942
Published
May 1, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362, CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=25d2ba94005fac18fe68878cddff59a67e115554 <6a4aee277740d04ac0fd54cfa17cc28261932ddc
  2. Affected versionversion=25d2ba94005fac18fe68878cddff59a67e115554 <a8a296ad9957b845b89bcf48be1cf8c74875ecc3
  3. Affected versionversion=6.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=25d2ba94005fac18fe68878cddff59a67e115554 <6a4aee277740d04ac0fd54cfa17cc28261932ddc; version=25d2ba94005fac18fe68878cddff59a67e115554 <a8a296ad9957b845b89bcf48be1cf8c74875ecc3; version=6.8
The Linux Kernel Organization · Linux Kernelversion=25d2ba94005f; version=6.8

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-476NULL Pointer Dereference
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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