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CVE-2026-85977

CVE-2026-85977 · Libtirpc: libtirpc: denial of service via unbounded memory allocation during portmapper response decoding

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

A flaw was found in libtirpc. A remote attacker can exploit this vulnerability by sending specially crafted PMAPPROC_DUMP replies to a client application that uses the pmap_getmaps() function against an attacker-controlled host. This unbounded decoding can lead to excessive memory and CPU allocation, causing the client process to experience a Denial of Service (DoS) due to resource exhaustion.

CVSS 5.3 · Medium · EPSS 0.3%

Published
Updated

Stack: system

Affected products and versions

  • red hat hardened images

    Versions
    • ≥ 1.3.8-0.1.hum1: Not affected (rpm)

    No fix published

  • red hat enterprise linux 10

    No fix published

  • red hat enterprise linux 6

    No fix published

  • red hat enterprise linux 7

    No fix published

  • red hat enterprise linux 8

    No fix published

  • red hat enterprise linux 9

    No fix published

  • red hat openshift container platform 4

    No fix published

  • libtirpc Debian:12

    Versions
    • 1.3.3+ds-1
    • 1.3.4+ds-1
    • 1.3.4+ds-1.1
    • 1.3.4+ds-1.1~exp1
    • 1.3.4+ds-1.1~exp2
    • 1.3.4+ds-1.2
    • 1.3.4+ds-1.3
    • 1.3.6+ds-1
    • 1.3.7+ds-1
    • 1.3.7-0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtirpc Debian:13

    Versions
    • 1.3.6+ds-1
    • 1.3.7+ds-1
    • 1.3.7-0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtirpc Debian:14

    Versions
    • 1.3.6+ds-1
    • 1.3.7+ds-1
    • 1.3.7-0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtirpc Ubuntu:14.04:LTS

    Versions
    • 0.2.2-5ubuntu1
    • 0.2.2-5ubuntu2
    • 0.2.2-5ubuntu2.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtirpc Ubuntu:16.04:LTS

    Versions
    • 0.2.5-1
    • 0.2.5-1ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ntirpc Ubuntu:16.04:LTS

    Versions
    • 1.3.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtirpc Ubuntu:18.04:LTS

    Versions
    • 0.2.5-1.2
    • 0.2.5-1.2ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ntirpc Ubuntu:18.04:LTS

    Versions
    • 1.4.4-1
    • 1.5.3-1
    • 1.6.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtirpc Ubuntu:20.04:LTS

    Versions
    • 1.1.4-0.4
    • 1.1.4-1
    • 1.2.5-1
    • 1.2.5-1ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ntirpc Ubuntu:20.04:LTS

    Versions
    • 1.7.4-2
    • 3.0-0ubuntu1
    • 3.0-0ubuntu2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtirpc Ubuntu:22.04:LTS

    Versions
    • 1.3.2-2
    • 1.3.2-2build1
    • 1.3.2-2ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ntirpc Ubuntu:22.04:LTS

    Versions
    • 3.4-2build1
    • 3.4-2build2
    • 3.5-1
    • 3.5-2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtirpc Ubuntu:24.04:LTS

    Versions
    • 1.3.3+ds-1
    • 1.3.4+ds-1
    • 1.3.4+ds-1build1
    • 1.3.4+ds-1.1
    • 1.3.4+ds-1.1build1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ntirpc Ubuntu:24.04:LTS

    Versions
    • 4.3-2
    • 4.3-3
    • 4.3-3.1
    • 4.3-3.1build1
    • 4.3-3.1build2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtirpc Ubuntu:26.10

    Versions
    • 1.3.7-0.1
    • 1.3.7+ds-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • ntirpc Ubuntu:26.10

    Versions
    • 6.3-4
    • 7.2-2ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • libtirpc Ubuntu:26.04:LTS

    Versions
    • 1.3.6+ds-1
    • 1.3.6+ds-1ubuntu1
    • 1.3.7-0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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