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CVE-2026-104041

CVE-2026-104041 · Sssd: sssd: denial of service via unbounded negative cache growth

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

A flaw was found in SSSD. An unprivileged local user can repeatedly request lookups for nonexistent entries through the Name Service Switch (NSS) responder. Because the negative cache does not limit the total number of stored entries and only removes expired records when an existing key is rechecked, the cache can grow without bound. This behavior can lead to memory exhaustion, resulting in a Denial of Service (DoS) as the responder becomes unresponsive or terminates.

CVSS 5.5 · Medium · EPSS 0.1%

Published
Updated

Stack: system

Affected products and versions

  • 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

  • sssd Debian:12

    Versions
    • 2.10.1-1
    • 2.10.1-2
    • 2.11.1-1
    • 2.11.1-2
    • 2.11.1-2.1
    • 2.12.0-1
    • 2.12.0-2
    • 2.12.0-3~exp0
    • 2.12.0-4
    • 2.13.1-1
    • 2.13.1-2
    • 2.13.1-3
    • 2.8.2-4
    • 2.8.2-4+deb12u1
    • 2.9.1-1
    • 2.9.1-2
    • 2.9.2-1
    • 2.9.4-1
    • 2.9.4-1.1
    • 2.9.4-1.1~exp1
    • 2.9.4-2
    • 2.9.5-1
    • 2.9.5-2
    • 2.9.5-3
    • 2.9.5-4
    • 2.9.5-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • sssd Debian:13

    Versions
    • 2.10.1-2
    • 2.11.1-1
    • 2.11.1-2
    • 2.11.1-2.1
    • 2.12.0-1
    • 2.12.0-2
    • 2.12.0-3~exp0
    • 2.12.0-4
    • 2.13.1-1
    • 2.13.1-2
    • 2.13.1-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • sssd Ubuntu:Pro:16.04:LTS

    Versions
    • 1.12.5-2
    • 1.13.1-2
    • 1.13.2-1
    • 1.13.3-1
    • 1.13.4-1
    • 1.13.4-1ubuntu1
    • 1.13.4-1ubuntu1.1
    • 1.13.4-1ubuntu1.2
    • 1.13.4-1ubuntu1.5
    • 1.13.4-1ubuntu1.6
    • 1.13.4-1ubuntu1.7
    • 1.13.4-1ubuntu1.8
    • 1.13.4-1ubuntu1.9
    • 1.13.4-1ubuntu1.10
    • 1.13.4-1ubuntu1.11
    • 1.13.4-1ubuntu1.12
    • 1.13.4-1ubuntu1.13
    • 1.13.4-1ubuntu1.14
    • 1.13.4-1ubuntu1.15
    • 1.13.4-1ubuntu1.15+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • sssd Ubuntu:Pro:18.04:LTS

    Versions
    • 1.15.3-2ubuntu1
    • 1.15.3-3ubuntu1
    • 1.16.0-5ubuntu1
    • 1.16.0-5ubuntu2
    • 1.16.1-1ubuntu1
    • 1.16.1-1ubuntu1.1
    • 1.16.1-1ubuntu1.2
    • 1.16.1-1ubuntu1.3
    • 1.16.1-1ubuntu1.4
    • 1.16.1-1ubuntu1.5
    • 1.16.1-1ubuntu1.6
    • 1.16.1-1ubuntu1.7
    • 1.16.1-1ubuntu1.8
    • 1.16.1-1ubuntu1.8+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • sssd Ubuntu:Pro:20.04:LTS

    Versions
    • 2.2.0-4ubuntu1
    • 2.2.2-1
    • 2.2.2-1ubuntu1
    • 2.2.3-1.1ubuntu1
    • 2.2.3-2
    • 2.2.3-3
    • 2.2.3-3ubuntu0.1
    • 2.2.3-3ubuntu0.2
    • 2.2.3-3ubuntu0.3
    • 2.2.3-3ubuntu0.4
    • 2.2.3-3ubuntu0.6
    • 2.2.3-3ubuntu0.7
    • 2.2.3-3ubuntu0.8
    • 2.2.3-3ubuntu0.9
    • 2.2.3-3ubuntu0.10
    • 2.2.3-3ubuntu0.11
    • 2.2.3-3ubuntu0.12
    • 2.2.3-3ubuntu0.13
    • 2.2.3-3ubuntu0.13+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • sssd Ubuntu:22.04:LTS

    Versions
    • 2.4.1-2ubuntu4
    • 2.5.2-4ubuntu1
    • 2.5.2-4ubuntu3
    • 2.5.2-4ubuntu4
    • 2.6.1-1ubuntu3
    • 2.6.3-1ubuntu3
    • 2.6.3-1ubuntu3.1
    • 2.6.3-1ubuntu3.2
    • 2.6.3-1ubuntu3.3
    • 2.6.3-1ubuntu3.4
    • 2.6.3-1ubuntu3.5
    • 2.6.3-1ubuntu3.6
    • 2.6.3-1ubuntu3.8
    • 2.6.3-1ubuntu3.9
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • sssd Ubuntu:24.04:LTS

    Versions
    • 2.9.1-2ubuntu2
    • 2.9.1-2ubuntu3
    • 2.9.2-1ubuntu2
    • 2.9.4-1ubuntu1
    • 2.9.4-1.1ubuntu3
    • 2.9.4-1.1ubuntu5
    • 2.9.4-1.1ubuntu6
    • 2.9.4-1.1ubuntu6.1
    • 2.9.4-1.1ubuntu6.2
    • 2.9.4-1.1ubuntu6.3
    • 2.9.4-1.1ubuntu6.4
    • 2.9.4-1.1ubuntu6.5
    • 2.9.4-1.1ubuntu6.6
    • 2.9.4-1.1ubuntu6.7
    • 2.9.4-1.1ubuntu6.8
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • sssd Ubuntu:26.10

    Versions
    • 2.12.0-1ubuntu5
    • 2.12.0-4ubuntu1
    • 2.12.0-4ubuntu2
    • 2.12.0-4ubuntu3
    • 2.12.0-4ubuntu4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • sssd Ubuntu:26.04:LTS

    Versions
    • 2.10.1-2ubuntu5
    • 2.10.1-2ubuntu7
    • 2.12.0-1ubuntu3
    • 2.12.0-1ubuntu4
    • 2.12.0-1ubuntu5
    • 2.12.0-1ubuntu5.1
    • 2.12.0-1ubuntu5.2
    • 2.12.0-1ubuntu5.3
    • 2.12.0-1ubuntu5.4
    • 2.12.0-1ubuntu5.5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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