Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5 hp-bioscfg hp-bioscfg.c hp_convert_hexstr_to_str out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00+

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5 and classified as problematic. Affected by this vulnerability is the function hp_convert_hexstr_to_str of the file hp-bioscfg.c of the component hp-bioscfg. Executing a manipulation can lead to out-of-bounds. This vulnerability appears as CVE-2026-90137. The attack requires local access. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.6.156/6.12.109/6.18.51/7.2.5. This vulnerability affects the function hp_convert_hexstr_to_str of the file hp-bioscfg.c of the component hp-bioscfg. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: platform/x86: hp-bioscfg: fix password encoding bounds check The password PSWD_ENCODINGS parser reads password_obj[elem + pos_values] while copying the supported password encodings from the ACPI package. The outer loop only guarantees that elem is within password_obj_count. The encoding count is bounded by MAX_ENCODINGS_SIZE, but that does not guarantee that the ACPI package contains enough entries for all elem + pos_values accesses. A malformed package can therefore declare a non-zero encoding count without providing enough string objects, causing the parser to read past the ACPI package array and pass an out-of-bounds string pointer and length to hp_convert_hexstr_to_str(). Add the same computed-index bounds check used by the other offset-based package parsing loops before reading password_obj[elem + pos_values].

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-90137 since 09/11/2026. The exploitation appears to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

Upgrading to version 6.6.157, 6.12.110, 6.18.52, 7.2.6 or 7.3-rc1 eliminates this vulnerability. Applying the patch c224759555a13735b0d67561d818cefe00c3309a/59fe8491ddaa03a510b352552e6ee291e7ce45d3/ace1ba5fca0ab775b3641e154bcbc3ccde26a71a/8a7499b8fd34438c1b11964e0e7ef5bd590fec92/e213939ed9e6e6badf7aa48c4c8dd9a9cdf00615 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.157/6.12.110/6.18.52/7.2.6/7.3-rc1
Patch: c224759555a13735b0d67561d818cefe00c3309a/59fe8491ddaa03a510b352552e6ee291e7ce45d3/ace1ba5fca0ab775b3641e154bcbc3ccde26a71a/8a7499b8fd34438c1b11964e0e7ef5bd590fec92/e213939ed9e6e6badf7aa48c4c8dd9a9cdf00615

Timelineinfo

09/11/2026 CVE reserved
09/17/2026 +6 days Advisory disclosed
09/17/2026 +0 days VulDB entry created
09/17/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-90137 (🔒)
GCVE (CVE): GCVE-0-2026-90137
GCVE (VulDB): GCVE-100-406648

Entryinfo

Created: 09/17/2026 19:47
Changes: 09/17/2026 19:47 (60)
Complete: 🔍
Cache ID: 216::103

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