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Advisory severityCritical9.8Vendor: HighRed Hat Linux

Critical [CVE-2026-8631] Arbitrary code execution and privilege escalation via integer overflow in hpcups

This critical-severity Red Hat Linux advisory covers CVE-2026-8631 affecting Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-8631 Source published Source updated

VulniPulse record published

CVE-2026-8631
Affected products & platforms
Red Hat LinuxRed Hat Enterprise Linux
Open source advisory

Summary

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.

A remote attacker who can submit print job content to the hpcups filter path may achieve arbitrary code execution or privilege escalation on systems using HPLIP for printing. Red Hat severity: Important — CVSS 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Weakness: CWE-190.

Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Enterprise Linux 6.

Is CVE-2026-8631 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-8631 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-8631?

Upgrade to a fixed release named by Red Hat:

  • hplip-0:3.23.12-10.el10_2.4
  • hplip-0:3.23.12-8.el10_0.2
  • hplip-0:3.18.4-13.el8_10
  • hplip-0:3.18.4-9.el8_4.1
  • hplip-0:3.18.4-9.el8_6.1
  • hplip-0:3.18.4-9.el8_8.1
  • hplip-0:3.21.2-6.el9_8.4
  • hplip-0:3.21.2-6.el9_2.1
  • hplip-0:3.21.2-6.el9_4.1
  • hplip-0:3.21.2-6.el9_6.1
  • RHSA-2026:26228
  • RHSA-2026:48606

8 more fixed releases are listed below.

Confirm against the vendor advisory before you patch.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.

Official advisory · high-confidence parse· fetched 3 days ago·verify at source

Fixed versions
  • hplip-0:3.23.12-10.el10_2.4
  • hplip-0:3.23.12-8.el10_0.2
  • hplip-0:3.18.4-13.el8_10
  • hplip-0:3.18.4-9.el8_4.1
  • hplip-0:3.18.4-9.el8_6.1
  • hplip-0:3.18.4-9.el8_8.1
  • hplip-0:3.21.2-6.el9_8.4
  • hplip-0:3.21.2-6.el9_2.1
  • hplip-0:3.21.2-6.el9_4.1
  • hplip-0:3.21.2-6.el9_6.1
  • RHSA-2026:26228
  • RHSA-2026:48606
  • RHSA-2026:26335
  • RHSA-2026:48960
  • RHSA-2026:48961
  • RHSA-2026:48959
  • RHSA-2026:26297
  • RHSA-2026:48603
  • RHSA-2026:48586
  • RHSA-2026:48171

Official advisory · high-confidence parse· fetched 3 days ago·verify at source

Mitigation

Upgrade to a fixed release: hplip-0:3.23.12-10.el10_2.4, hplip-0:3.23.12-8.el10_0.2, hplip-0:3.18.4-13.el8_10, hplip-0:3.18.4-9.el8_4.1, hplip-0:3.18.4-9.el8_6.1, hplip-0:3.18.4-9.el8_8.1. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 3 days ago·verify at source

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