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CVE-2026-4897

CVE-2026-4897 · Polkit: polkit: denial of service via unbounded input processing through standard input

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

A flaw was found in polkit. A local user can exploit this by providing a specially crafted, excessively long input to the `polkit-agent-helper-1` setuid binary via standard input (stdin). This unbounded input can lead to an out-of-memory (OOM) condition, resulting in a Denial of Service (DoS) for the system.

CVSS 5.5 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • red hat enterprise linux 10

    Versions
    • ≥ 0:125-4.el10_2.1: Not affected (rpm)

    No fix published

  • red hat hardened images

    Versions
    • ≥ 127-5.1.hum1: Not affected (rpm)

    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

  • policykit-1 Debian:12

    Versions
    • 122-3
    • 122-4
    • 123-1
    • 123-2
    • 123-3
    • 124-1
    • 124-2
    • 124-3
    • 125-1
    • 125-2
    • 126-1
    • 126-2
    • 127-1
    • 127-2
    • 127-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • policykit-1 Debian:13

    Versions
    • 126-2
    • 127-1
    • 127-2
    • 127-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • policykit-1 Debian:14

    Versions
    • 126-2
    • 127-1
    • 127-2
    Affected ranges
    • ECOSYSTEM: < 127-3

    Update to 127-3

  • policykit-1 Ubuntu:Pro:14.04:LTS

    Versions
    • 0.105-3ubuntu3
    • 0.105-4ubuntu1
    • 0.105-4ubuntu2
    • 0.105-4ubuntu2.14.04.1
    • 0.105-4ubuntu3.14.04.1
    • 0.105-4ubuntu3.14.04.2
    • 0.105-4ubuntu3.14.04.5
    • 0.105-4ubuntu3.14.04.6
    • 0.105-4ubuntu3.14.04.6+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • policykit-1 Ubuntu:Pro:16.04:LTS

    Versions
    • 0.105-11ubuntu2
    • 0.105-13
    • 0.105-13ubuntu1
    • 0.105-14
    • 0.105-14.1
    • 0.105-14.1ubuntu0.1
    • 0.105-14.1ubuntu0.4
    • 0.105-14.1ubuntu0.5
    • 0.105-14.1ubuntu0.5+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • policykit-1 Ubuntu:18.04:LTS

    Versions
    • 0.105-18
    • 0.105-20
    • 0.105-20ubuntu0.18.04.1
    • 0.105-20ubuntu0.18.04.4
    • 0.105-20ubuntu0.18.04.5
    • 0.105-20ubuntu0.18.04.6
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • policykit-1 Ubuntu:20.04:LTS

    Versions
    • 0.105-26ubuntu1
    • 0.105-26ubuntu1.1
    • 0.105-26ubuntu1.2
    • 0.105-26ubuntu1.3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • policykit-1 Ubuntu:22.04:LTS

    Versions
    • 0.105-31
    • 0.105-31ubuntu1
    • 0.105-31.1
    • 0.105-32
    • 0.105-33
    Affected ranges
    • ECOSYSTEM: < 0.105-33ubuntu0.1

    Update to 0.105-33ubuntu0.1

  • policykit-1 Ubuntu:24.04:LTS

    Versions
    • 123-1
    • 123-3
    • 124-1
    • 124-1ubuntu1
    • 124-2ubuntu1
    • 124-2ubuntu1.24.04.2
    Affected ranges
    • ECOSYSTEM: < 124-2ubuntu1.24.04.3

    Update to 124-2ubuntu1.24.04.3

  • policykit-1 Ubuntu:25.10

    Versions
    • 126-2
    Affected ranges
    • ECOSYSTEM: < 126-2ubuntu0.1

    Update to 126-2ubuntu0.1

Original sources

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