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CVE Record

CVE-2025-71101: platform/x86: hp-bioscfg: Fix out-of-bounds array access in ACPI package parsing

In the Linux kernel, the following vulnerability has been resolved: platform/x86: hp-bioscfg: Fix out-of-bounds array access in ACPI package parsing The hp_populate_*_elements_from_package() functions in the hp-bioscfg driver contain out-of-bounds array access vulnerabilities. These functions parse ACPI packages into internal data structures using a for loop with index variable 'elem' that iterates through enum_obj/integer_obj/order_obj/password_obj/string_obj arrays. When processing multi-element fields like PREREQUISITES and ENUM_POSSIBLE_VALUES, these functions read multiple consecutive array elements using expressions like 'enum_obj[elem + reqs]' and 'enum_obj[elem + pos_values]' within nested loops. The bug is that the bounds check only validated elem, but did not consider the additional offset when accessing elem + reqs or elem + pos_values. The fix changes the bounds check to validate the actual accessed index.

HighCVSS 7.1Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux driver used for HP BIOS configuration can read beyond an array while interpreting firmware-provided ACPI data. On affected HP x86 systems, this could expose sensitive kernel memory or crash the system. The issue requires local, low-privileged access according to the supplied CVSS vector; it is not described as remotely exploitable.

Executive priority

Treat this as a high-priority endpoint patching issue, especially on shared or locally accessible HP Linux systems. It is less urgent than an unauthenticated remote flaw, but potential kernel-memory disclosure and system crashes justify prompt validation and remediation.

Technical view

The hp-bioscfg package-parsing functions checked the base element index but not added offsets used for multi-element fields such as prerequisites and possible values. Crafted or malformed ACPI package contents could therefore cause out-of-bounds reads. The kernel fix validates the actual accessed index. The supplied CVSS 3.1 score is 7.1, with high confidentiality and availability impact.

Likely exposure

Exposure is most likely limited to HP x86 systems running an affected Linux kernel with the hp-bioscfg driver applicable or active. The bundle lists several kernel versions and commits, but does not provide reliable distribution-package mappings. Organizations should confirm exposure against their Linux vendor’s advisory and patched package versions.

Exploitation context

The supplied CVSS vector indicates local access, low attack complexity, low privileges, and no user interaction. The source bundle does not establish the precise attacker-controlled input path. CVE-2025-71101 is not listed as KEV in the bundle, and no supplied source reports active exploitation or a public exploit.

Researcher notes

The defect is an offset-aware bounds-check failure in ACPI package parsing. No CWE is assigned in the supplied record. The available evidence supports out-of-bounds reads, but does not document proven exploitability, attacker input construction, affected distribution packages, or exploitation in the wild. Review each stable commit for branch-specific applicability.

Mitigation direction

  • Install a vendor-supported kernel containing the referenced hp-bioscfg bounds-check fix.
  • Check Linux distribution advisories for corrected package versions and required reboot instructions.
  • Prioritize affected HP endpoints where untrusted users can obtain local accounts.
  • Restrict unnecessary local access until affected systems are updated.

Validation and detection

  • Inventory HP x86 systems, running kernel versions, and hp-bioscfg driver presence.
  • Compare installed kernel packages with vendor advisories and the referenced stable commits.
  • Confirm the updated kernel is active after reboot, not merely installed.
  • Monitor affected hosts for unexplained kernel faults or crashes involving hp-bioscfg.
Prepared
Confidence
high
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2025-71101 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
7.1 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
0ADP providers
5Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
7.1CVSS 3.1HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H1.85.2Linux

Vulnerability scoring details

Base CVSS 3.1 score

7.1High
CVSS 3.1 vector shape for CVE-2025-71101Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxe6c7b3e15559699a30646dd45195549c7db447bd, e6c7b3e15559699a30646dd45195549c7db447bd, e6c7b3e15559699a30646dd45195549c7db447bd, e6c7b3e15559699a30646dd45195549c7db447bdunaffected
LinuxLinux6.6, 0, 6.6.120, 6.12.64, 6.18.4, 6.19affected
Weakness

CWE details

No CWE listed

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