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CVE Record

CVE-2026-8631: HP Linux Imaging and Printing Software – Potential Escalation of Privilege and Arbitrary Code Execution

A potential security vulnerability has been identified in the HP Linux Imaging and Printing Software. This potential vulnerability may allow escalation of privileges and/or arbitrary code execution via an integer overflow in the hpcups processing path when handling crafted print data.

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A maliciously crafted print job could trigger a numeric error in HP’s Linux printing software, potentially allowing code execution or higher privileges. Successful exploitation could compromise the confidentiality, integrity, and availability of the affected Linux system. The supplied version value is not usable for determining which installations are vulnerable.

Executive priority

Prioritize immediate exposure assessment and expedited remediation for internet-facing, shared, or security-sensitive Linux systems. The critical score justifies urgency, while the absence of confirmed exploitation supports controlled emergency patching rather than declaring an active incident without additional evidence.

Technical view

CVE-2026-8631 is an integer overflow in the HPLIP hpcups processing path when handling crafted print data. The record maps to CWE-190 and CWE-122. Its CVSS 3.1 vector rates it network-accessible, low-complexity, unauthenticated, and requiring no user interaction, with high confidentiality, integrity, and availability impact.

Likely exposure

Potential exposure includes Linux systems running HP Linux Imaging and Printing Software that process print data from untrusted or network-accessible sources. The bundle reports affected version “0,” which is insufficient for reliable scoping. Administrators must compare installed packages with HP and distribution-specific advisories.

Exploitation context

The 9.8 CVSS score indicates severe theoretical exploitability and impact. However, the bundle marks this CVE as absent from KEV and provides no evidence of active exploitation or a public exploit. Exploitation status should therefore be treated as unconfirmed.

Researcher notes

The supplied affected-version entry, “0,” is ambiguous and should not drive detection logic. Validate applicability through HP’s bulletin, Red Hat’s CVE entry, CSAF/VEX data, and relevant errata. The bundle establishes the hpcups path, crafted print data, integer overflow, and possible privilege escalation or code execution, but provides no detailed root-cause analysis.

Mitigation direction

  • Inventory Linux systems running HPLIP and record installed package versions.
  • Review HP guidance and applicable Red Hat errata; install vendor-provided fixed packages where available.
  • Until updated, restrict untrusted access to print services and hpcups processing.
  • Disable unnecessary printing components on systems where operationally safe.

Validation and detection

  • Compare installed HPLIP packages with HP and distribution-specific advisories.
  • Confirm applicable vendor update packages are installed successfully.
  • Verify unauthorized or untrusted users cannot submit print data where unnecessary.
  • Review printing-service logs for unusual jobs, crashes, or repeated processing failures.
Prepared
Confidence
medium
Sources
8

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.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-122: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cwe · low confidence lookup

CWE-190: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
description · low confidence lookup

Execution behavior lookup

The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-8631 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

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

2CVSS vectors
5Timeline events
2ADP providers
15Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

2 official scores

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
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9redhat-SADP
9.3CVSS 4.0CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N——hp

Vulnerability scoring details

Base CVSS 4.0 score

9.3Critical
CVSS 4.0 vector shape for CVE-2026-8631Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
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. ADP timelineredhat-SADP

    Made public.

  3. CVE publishedCVE Program

    The CVE record was published.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

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

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc
redhat-SADPHPLIP: HPLIP: Arbitrary code execution and privilege escalation via integer overflow in hpcups
other:Red Hat severity ratingcvssV3_1
  • 2026-05-20T21:01:20.613Z: Reported to Red Hat.
  • 2026-05-20T20:11:14.070Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
HP IncHP Linux Imaging and Printing Software0affected
Weakness

CWE details

CWE-122CWE-190

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.