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Highest advisory severityHigh 1 vendor · 1 advisory

CVE-2026-56003

CVE-2026-56003: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Red Hat

1 advisory
  • Advisory severityHigh7.3

    High [CVE-2026-56003] computeProps Property Buffer Heap Buffer Overflow

    CVE-2026-56003Source published Source updated

    A heap buffer overflow due to missing size checking in the property buffer when parsing PCF files in libXfont2 ComputeScaledProperties() before libXfont2 before 2.0.8 could be used by attackers using authenticated X clients to execute code within the X server. Red Hat severity: Important — CVSS 7.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H). Affected Red Hat products: Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle 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…

    Affected products in this advisory
    • Red Hat Enterprise Linux 10.0 Extended Update Support
    • Red Hat Enterprise Linux 7 Extended Lifecycle 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

    8 more entries in the full advisory.

    Source-reported affected versions
    • < 2.0.8
    Source-reported fixed versions
    • libXfont2-0:2.0.6-5.el10_0.1
    • libXfont2-0:2.0.3-2.el7_9
    • libXfont2-0:2.0.3-2.el8_10.1
    • libXfont2-0:2.0.3-2.el8_4.1

    14 more entries in the full advisory.

    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

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