CVE-2026-23131

Kernel interruption via empty BIOS attribute names

Published Feb 14, 2026 · Updated Feb 14, 2026

Improper input validation in Linux Kernel 6.6 and later allows local users to interrupt service on systems with malformed HP BIOS attributes. hp_init_bios_buffer_attribute() passes an empty name parsed from a WMI buffer to kobject registration instead of rejecting the attribute. Reachability requires the hp-bioscfg driver on HP hardware whose BIOS exposes an empty attribute name; the documented outcome is repeated kernel warnings.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Linux Kernel 6.6 and later allows local users to interrupt service on systems with malformed HP BIOS attributes. hp_init_bios_buffer_attribute() passes an empty name parsed from a WMI buffer to kobject registration instead of rejecting the attribute. Reachability requires the hp-bioscfg driver on HP hardware whose BIOS exposes an empty attribute name; the documented outcome is repeated kernel warnings.

The record

CVE
CVE-2026-23131
Published
Feb 14, 2026
Updated
Feb 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
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

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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=6.6
  2. Affected versionversion=a34fc329b1895fc8a6eb12099adc47009421ba6a <29917c80aa96a25cbcf5876fd774a1cfd72b01a9
  3. Affected versionversion=a34fc329b1895fc8a6eb12099adc47009421ba6a <6476be59b7162b891b7bddbd0c2924d87379ef6c
  4. Affected versionversion=a34fc329b1895fc8a6eb12099adc47009421ba6a <800b2767905d6b409b8bbe357121970f0b489a89
  5. Affected versionversion=a34fc329b1895fc8a6eb12099adc47009421ba6a <fdee1b09721605f532352628d0a24623e7062efb

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.6; version=a34fc329b1895fc8a6eb12099adc47009421ba6a <29917c80aa96a25cbcf5876fd774a1cfd72b01a9; version=a34fc329b1895fc8a6eb12099adc47009421ba6a <6476be59b7162b891b7bddbd0c2924d87379ef6c; version=a34fc329b1895fc8a6eb12099adc47009421ba6a <800b2767905d6b409b8bbe357121970f0b489a89; version=a34fc329b1895fc8a6eb12099adc47009421ba6a <fdee1b09721605f532352628d0a24623e7062efb

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

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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