CVE-2026-90137Hinoki check available

Out-of-bounds read via unchecked ACPI index

Published Sep 17, 2026 · Updated Sep 18, 2026

Out-of-bounds read in the Linux hp-bioscfg password parser allows attackers to access invalid memory through a malformed ACPI package. The PSWD_ENCODINGS loop reads password_obj[elem + pos_values] without confirming that the computed index remains below password_obj_count, then passes the invalid string pointer and length to hp_convert_hexstr_to_str(). Exposure requires the HP BIOS configuration driver to parse malformed firmware-supplied data and can disclose kernel data or interrupt the system.

CVSS severity3.4
Low
EPSS probability0.18%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Out-of-bounds read in the Linux hp-bioscfg password parser allows attackers to access invalid memory through a malformed ACPI package. The PSWD_ENCODINGS loop reads password_obj[elem + pos_values] without confirming that the computed index remains below password_obj_count, then passes the invalid string pointer and length to hp_convert_hexstr_to_str(). Exposure requires the HP BIOS configuration driver to parse malformed firmware-supplied data and can disclose kernel data or interrupt the system.

The record

CVE
CVE-2026-90137
Published
Sep 17, 2026
Updated
Sep 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 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=8646a3b5ee3a5b384a22a721f37c24274d974045 <59fe8491ddaa03a510b352552e6ee291e7ce45d3
  3. Affected versionversion=8646a3b5ee3a5b384a22a721f37c24274d974045 <8a7499b8fd34438c1b11964e0e7ef5bd590fec92
  4. Affected versionversion=8646a3b5ee3a5b384a22a721f37c24274d974045 <ace1ba5fca0ab775b3641e154bcbc3ccde26a71a
  5. Affected versionversion=8646a3b5ee3a5b384a22a721f37c24274d974045 <c224759555a13735b0d67561d818cefe00c3309a
  6. Affected versionversion=8646a3b5ee3a5b384a22a721f37c24274d974045 <e213939ed9e6e6badf7aa48c4c8dd9a9cdf00615

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=8646a3b5ee3a5b384a22a721f37c24274d974045 <59fe8491ddaa03a510b352552e6ee291e7ce45d3; version=8646a3b5ee3a5b384a22a721f37c24274d974045 <8a7499b8fd34438c1b11964e0e7ef5bd590fec92; version=8646a3b5ee3a5b384a22a721f37c24274d974045 <ace1ba5fca0ab775b3641e154bcbc3ccde26a71a; version=8646a3b5ee3a5b384a22a721f37c24274d974045 <c224759555a13735b0d67561d818cefe00c3309a; version=8646a3b5ee3a5b384a22a721f37c24274d974045 <e213939ed9e6e6badf7aa48c4c8dd9a9cdf00615

Published CVSS scores

3.4Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:L

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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