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CVE-2025-8671

CVE-2025-8671

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 mismatch caused by client-triggered server-sent stream resets between HTTP/2 specifications and the internal architectures of some HTTP/2 implementations may result in excessive server resource consumption leading to denial-of-service (DoS). By opening streams and then rapidly triggering the server to reset them—using malformed frames or flow control errors—an attacker can exploit incorrect stream accounting. Streams reset by the server are considered closed at the protocol level, even though backend processing continues. This allows a client to cause the server to handle an unbounded number of concurrent streams on a single connection. This CVE will be updated as affected product details are released.

CVSS 7.5 · High · EPSS 3.6% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • enterprise module for development tools

    Versions
    • ≥ 15 SP2, < 15-SP5: Affected (custom)

    Update to 15-SP5

  • enterprise high performance computing (hpc)

    Versions
    • ≥ 15, < 15 SP5: Affected (custom)

    No fix published

  • varnish enterprise

    Versions
    • ≥ 6.0.x, ≤ 6.0.14r4: Affected (custom)

    No fix published

  • varnish cache

    Versions
    • ≥ 6.0LTS, ≤ 6.014: Affected (custom)

    No fix published

  • varnish cache

    Versions
    • ≥ 5.x, ≤ 7.71: Affected (custom)

    No fix published

  • h20

    Versions
    • 579ecfa: Affected

    No fix published

  • linux

    Versions
    • ≥ LTS22, ≤ TLS25: Affected (custom)

    No fix published

  • enterprise desktop

    Versions
    • ≥ 15 SP6, < 15 SP7: Affected (custom)

    Update to 15 SP7

  • enterprise high performance computing

    Versions
    • ≥ 15 SP3, < 15 SP7: Affected (custom)

    Update to 15 SP7

  • enterprise module for dev tools

    Versions
    • ≥ 15 SP3, < 15 SP7: Affected (custom)

    Update to 15 SP7

  • enterprise module for package hub

    Versions
    • ≥ 15 SP5, < 15 SP7: Affected (custom)

    Update to 15 SP7

  • enterprise server

    Versions
    • ≥ 12 SP5, < 15 SP7: Affected (custom)

    Update to 15 SP7

  • enterprise server for sap applications

    Versions
    • ≥ 15 SP6, < 15 SP7: Affected (custom)

    Update to 15 SP7

  • suse manager server

    Versions
    • 4.3: Affected

    No fix published

  • suse manager server lts

    Versions
    • 4.3: Affected

    No fix published

  • suse manager proxy

    Versions
    • 4.3: Affected

    No fix published

  • suse manager retail branch server

    Versions
    • 4.3: Affected

    No fix published

  • opensuse leap

    Versions
    • 15.6: Affected

    No fix published

  • h2o Debian:12

    Versions
    • 2.2.5+dfsg2-10
    • 2.2.5+dfsg2-11
    • 2.2.5+dfsg2-7
    • 2.2.5+dfsg2-8
    • 2.2.5+dfsg2-8.1
    • 2.2.5+dfsg2-8.1~exp1
    • 2.2.5+dfsg2-9
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Debian:12

    Versions
    • 7.1.1-1.1
    • 7.1.1-1.1+deb12u1
    • 7.1.1-1.2
    • 7.1.1-2+deb12u1
    • 7.5.0-1
    • 7.5.0-2
    • 7.5.0-3
    • 7.6.0-1
    • 7.6.0-2
    • 7.6.1-1
    • 7.6.1-2
    • 7.7.0-1
    • 7.7.0-2
    • 7.7.0-3
    • 7.7.1-1
    • 7.7.2-1
    • 7.7.2-2
    • 7.7.3-1
    • 7.7.3-2
    • 7.7.3-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Debian:13

    Versions
    • 7.7.0-3
    Affected ranges
    • ECOSYSTEM: < 7.7.0-3+deb13u1

    Update to 7.7.0-3+deb13u1

  • lighttpd Ubuntu:Pro:14.04:LTS

    Versions
    • 1.4.31-3ubuntu3
    • 1.4.33-1ubuntu1
    • 1.4.33-1+nmu2ubuntu1
    • 1.4.33-1+nmu2ubuntu2
    • 1.4.33-1+nmu2ubuntu2.1
    • 1.4.33-1+nmu2ubuntu2.1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • varnish Ubuntu:14.04:LTS

    Versions
    • 3.0.4-1ubuntu1
    • 3.0.4-1ubuntu2
    • 3.0.5-1ubuntu2
    • 3.0.5-2
    • 3.0.5-2ubuntu0.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • lighttpd Ubuntu:Pro:16.04:LTS

    Versions
    • 1.4.35-4ubuntu1
    • 1.4.35-4ubuntu2
    • 1.4.35-4ubuntu2.1
    • 1.4.35-4ubuntu2.1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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