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CVE-2026-11573

CVE-2026-11573 · Uncontrolled recursion in QDomDocument/QDomNode serialization causes stack exhaustion (QtXml)

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

Uncontrolled recursion (CWE-674) in the QDomDocument/QDomNode serialization path of the Qt XML module (QtXml, qtbase). QDomElementPrivate::save() and QDomNodePrivate::save() recurse mutually, consuming one stack frame per level of element nesting with no depth limit, no configurable bound and no error return. A document with deeply nested elements parses successfully but exhausts the call stack and terminates the process when serialized. Reachable via QDomDocument::toByteArray() (Qt 4.0 and later), QDomDocument::toString(), QDomDocument::toCString(), QDomNode::save(), and operator<<(QTextStream&, const QDomNode&). Denial of service only — no code execution and no memory disclosure.

CVSS 7.1 · High · EPSS 0.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • qt

    Versions
    • ≥ 2.2.0, < 6.8.2: Affected (python)

    Update to 6.8.2

  • qt6-base Debian:12

    Versions
    • 6.10.2+dfsg-1
    • 6.10.2+dfsg-10
    • 6.10.2+dfsg-10+hurd.1
    • 6.10.2+dfsg-11
    • 6.10.2+dfsg-12
    • 6.10.2+dfsg-13
    • 6.10.2+dfsg-14
    • 6.10.2+dfsg-15
    • 6.10.2+dfsg-16
    • 6.10.2+dfsg-2
    • 6.10.2+dfsg-3
    • 6.10.2+dfsg-4
    • 6.10.2+dfsg-5
    • 6.10.2+dfsg-6
    • 6.10.2+dfsg-7
    • 6.10.2+dfsg-7+hurd.1
    • 6.10.2+dfsg-8
    • 6.10.2+dfsg-9
    • 6.11.2+dfsg-1
    • 6.11.2+dfsg-2
    • 6.11.2+dfsg-3
    • 6.11.2+dfsg-4
    • 6.11.2+dfsg-5
    • 6.4.2+dfsg-10
    • 6.4.2+dfsg-11
    • 6.4.2+dfsg-11~bpo11+1
    • 6.4.2+dfsg-12
    • 6.4.2+dfsg-13
    • 6.4.2+dfsg-14
    • 6.4.2+dfsg-15
    • 6.4.2+dfsg-16
    • 6.4.2+dfsg-17
    • 6.4.2+dfsg-18
    • 6.4.2+dfsg-18+loong64
    • 6.4.2+dfsg-19
    • 6.4.2+dfsg-20
    • 6.4.2+dfsg-21
    • 6.4.2+dfsg-21.1
    • 6.6.0+dfsg-1
    • 6.6.0+dfsg-2
    • 6.6.0+dfsg-3
    • 6.6.0+dfsg-4
    • 6.6.0+dfsg-5
    • 6.6.0+dfsg-6
    • 6.6.1+dfsg-1
    • 6.6.1+dfsg-2
    • 6.6.1+dfsg-3
    • 6.6.1+dfsg-4
    • 6.6.1+dfsg-5
    • 6.6.1+dfsg-6
    • 6.6.2+dfsg-1
    • 6.6.2+dfsg-10
    • 6.6.2+dfsg-11
    • 6.6.2+dfsg-12
    • 6.6.2+dfsg-2
    • 6.6.2+dfsg-3
    • 6.6.2+dfsg-4
    • 6.6.2+dfsg-5
    • 6.6.2+dfsg-6
    • 6.6.2+dfsg-7
    • 6.6.2+dfsg-8
    • 6.6.2+dfsg-9
    • 6.7.2+dfsg-1
    • 6.7.2+dfsg-2
    • 6.7.2+dfsg-3
    • 6.7.2+dfsg-4
    • 6.7.2+dfsg-4+m68k
    • 6.7.2+dfsg-5
    • 6.7.2+dfsg-6
    • 6.8.2+dfsg-1
    • 6.8.2+dfsg-10
    • 6.8.2+dfsg-10.1
    • 6.8.2+dfsg-2
    • 6.8.2+dfsg-3
    • 6.8.2+dfsg-4
    • 6.8.2+dfsg-5
    • 6.8.2+dfsg-5+m68k
    • 6.8.2+dfsg-6
    • 6.8.2+dfsg-7
    • 6.8.2+dfsg-8
    • 6.8.2+dfsg-9
    • 6.9.1+dfsg-1
    • 6.9.1+dfsg-2
    • 6.9.1+dfsg-3
    • 6.9.1+dfsg-4
    • 6.9.1+dfsg-5
    • 6.9.2+dfsg-1
    • 6.9.2+dfsg-2
    • 6.9.2+dfsg-3
    • 6.9.2+dfsg-4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qt6-base Debian:13

    Affected ranges
    • ECOSYSTEM: < 6.8.2+dfsg-5

    Update to 6.8.2+dfsg-5

  • qt6-base Debian:14

    Affected ranges
    • ECOSYSTEM: < 6.8.2+dfsg-5

    Update to 6.8.2+dfsg-5

  • qtbase-opensource-src Debian:12

    Versions
    • 5.15.10+dfsg-1
    • 5.15.10+dfsg-2
    • 5.15.10+dfsg-3
    • 5.15.10+dfsg-4
    • 5.15.10+dfsg-5
    • 5.15.10+dfsg-6
    • 5.15.10+dfsg-7
    • 5.15.10+dfsg-7.1
    • 5.15.10+dfsg-7.2
    • 5.15.11+dfsg-1
    • 5.15.12+dfsg-1
    • 5.15.12+dfsg-2
    • 5.15.12+dfsg-3
    • 5.15.13+dfsg-1
    • 5.15.13+dfsg-2
    • 5.15.13+dfsg-3
    • 5.15.13+dfsg-4
    • 5.15.14+dfsg-1
    • 5.15.15+dfsg-1
    • 5.15.15+dfsg-2
    • 5.15.15+dfsg-3
    • 5.15.15+dfsg-4
    • 5.15.15+dfsg-5
    • 5.15.15+dfsg-6
    • 5.15.16+dfsg-1
    • 5.15.16+dfsg-2
    • 5.15.17+dfsg-1
    • 5.15.17+dfsg-2
    • 5.15.17+dfsg-3
    • 5.15.17+dfsg-4
    • 5.15.17+dfsg-5
    • 5.15.17+dfsg-6
    • 5.15.17+dfsg-7
    • 5.15.17+dfsg-8
    • 5.15.18+dfsg-1
    • 5.15.18+dfsg-2
    • 5.15.19+dfsg-1
    • 5.15.19+dfsg-2
    • 5.15.19+dfsg-3
    • 5.15.19+dfsg-4
    • 5.15.19+dfsg-5
    • 5.15.8+dfsg-11
    • 5.15.8+dfsg-11+deb12u1
    • 5.15.8+dfsg-11+deb12u2
    • 5.15.8+dfsg-11+deb12u3
    • 5.15.8+dfsg-12
    • 5.15.8+dfsg-13
    • 5.15.9+dfsg-1
    • 5.15.9+dfsg-2
    • 5.15.9+dfsg-3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src Debian:13

    Versions
    • 5.15.15+dfsg-6
    • 5.15.15+dfsg-6+deb13u1
    • 5.15.16+dfsg-1
    • 5.15.16+dfsg-2
    • 5.15.17+dfsg-1
    • 5.15.17+dfsg-2
    • 5.15.17+dfsg-3
    • 5.15.17+dfsg-4
    • 5.15.17+dfsg-5
    • 5.15.17+dfsg-6
    • 5.15.17+dfsg-7
    • 5.15.17+dfsg-8
    • 5.15.18+dfsg-1
    • 5.15.18+dfsg-2
    • 5.15.19+dfsg-1
    • 5.15.19+dfsg-2
    • 5.15.19+dfsg-3
    • 5.15.19+dfsg-4
    • 5.15.19+dfsg-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src Debian:14

    Versions
    • 5.15.15+dfsg-6
    • 5.15.16+dfsg-1
    • 5.15.16+dfsg-2
    • 5.15.17+dfsg-1
    • 5.15.17+dfsg-2
    • 5.15.17+dfsg-3
    • 5.15.17+dfsg-4
    • 5.15.17+dfsg-5
    • 5.15.17+dfsg-6
    • 5.15.17+dfsg-7
    • 5.15.17+dfsg-8
    • 5.15.18+dfsg-1
    • 5.15.18+dfsg-2
    • 5.15.19+dfsg-1
    • 5.15.19+dfsg-2
    • 5.15.19+dfsg-3
    • 5.15.19+dfsg-4
    • 5.15.19+dfsg-5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src Ubuntu:Pro:16.04:LTS

    Versions
    • 5.4.2+dfsg-2ubuntu9
    • 5.5.1+dfsg-6ubuntu4
    • 5.5.1+dfsg-10ubuntu2
    • 5.5.1+dfsg-13ubuntu1
    • 5.5.1+dfsg-13ubuntu2
    • 5.5.1+dfsg-13ubuntu3
    • 5.5.1+dfsg-14ubuntu1
    • 5.5.1+dfsg-14ubuntu2
    • 5.5.1+dfsg-14ubuntu3
    • 5.5.1+dfsg-15ubuntu1
    • 5.5.1+dfsg-16ubuntu1
    • 5.5.1+dfsg-16ubuntu6
    • 5.5.1+dfsg-16ubuntu7
    • 5.5.1+dfsg-16ubuntu7.1
    • 5.5.1+dfsg-16ubuntu7.2
    • 5.5.1+dfsg-16ubuntu7.5
    • 5.5.1+dfsg-16ubuntu7.6
    • 5.5.1+dfsg-16ubuntu7.7
    • 5.5.1+dfsg-16ubuntu7.7+esm1
    • 5.5.1+dfsg-16ubuntu7.7+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src Ubuntu:Pro:18.04:LTS

    Versions
    • 5.9.1+dfsg-10ubuntu1
    • 5.9.1+dfsg-10ubuntu2
    • 5.9.2+dfsg-4ubuntu6
    • 5.9.3+dfsg-0ubuntu1
    • 5.9.3+dfsg-0ubuntu3
    • 5.9.3+dfsg-0ubuntu4
    • 5.9.4+dfsg-0ubuntu3
    • 5.9.4+dfsg-0ubuntu4
    • 5.9.5+dfsg-0ubuntu1
    • 5.9.5+dfsg-0ubuntu2
    • 5.9.5+dfsg-0ubuntu2.1
    • 5.9.5+dfsg-0ubuntu2.3
    • 5.9.5+dfsg-0ubuntu2.4
    • 5.9.5+dfsg-0ubuntu2.5
    • 5.9.5+dfsg-0ubuntu2.6
    • 5.9.5+dfsg-0ubuntu2.6+esm1
    • 5.9.5+dfsg-0ubuntu2.6+esm2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src Ubuntu:Pro:20.04:LTS

    Versions
    • 5.12.4+dfsg-4ubuntu1
    • 5.12.5+dfsg-2
    • 5.12.5+dfsg-8
    • 5.12.5+dfsg-8build1
    • 5.12.5+dfsg-9build1
    • 5.12.8+dfsg-0ubuntu1
    • 5.12.8+dfsg-0ubuntu2.1
    • 5.12.8+dfsg-0ubuntu2.1+esm1
    • 5.12.8+dfsg-0ubuntu2.1+esm2
    • 5.12.8+dfsg-0ubuntu2.1+esm3
    • 5.12.8+dfsg-0ubuntu2.1+esm4
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qt6-base Ubuntu:22.04:LTS

    Versions
    • 6.2.2+dfsg-5ubuntu1
    • 6.2.2+dfsg-6ubuntu1
    • 6.2.2+dfsg-6ubuntu2
    • 6.2.4+dfsg-1ubuntu1
    • 6.2.4+dfsg-2ubuntu1
    • 6.2.4+dfsg-2ubuntu1.1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src Ubuntu:Pro:22.04:LTS

    Versions
    • 5.15.2+dfsg-12
    • 5.15.2+dfsg-13
    • 5.15.2+dfsg-14
    • 5.15.2+dfsg-14ubuntu1
    • 5.15.2+dfsg-14ubuntu3
    • 5.15.2+dfsg-15
    • 5.15.3+dfsg-1
    • 5.15.3+dfsg-2
    • 5.15.3+dfsg-2ubuntu0.1
    • 5.15.3+dfsg-2ubuntu0.2
    • 5.15.3+dfsg-2ubuntu0.2+esm1
    • 5.15.3+dfsg-2ubuntu0.2+esm2
    • 5.15.3+dfsg-2ubuntu0.2+esm3
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qt6-base Ubuntu:24.04:LTS

    Versions
    • 6.4.2+dfsg-18
    • 6.4.2+dfsg-19
    • 6.4.2+dfsg-19build1
    • 6.4.2+dfsg-20
    • 6.4.2+dfsg-21
    • 6.4.2+dfsg-21.1build4
    • 6.4.2+dfsg-21.1build5
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src Ubuntu:Pro:24.04:LTS

    Versions
    • 5.15.10+dfsg-3
    • 5.15.10+dfsg-5
    • 5.15.10+dfsg-5ubuntu1
    • 5.15.12+dfsg-1ubuntu1
    • 5.15.12+dfsg-3ubuntu1
    • 5.15.12+dfsg-3ubuntu6
    • 5.15.12+dfsg-3ubuntu7
    • 5.15.13+dfsg-1ubuntu1
    • 5.15.13+dfsg-1ubuntu1+esm1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src Ubuntu:26.10

    Versions
    • 5.15.18+dfsg-1ubuntu1
    • 5.15.19+dfsg-2ubuntu1
    • 5.15.19+dfsg-2ubuntu2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src Ubuntu:26.04:LTS

    Versions
    • 5.15.17+dfsg-1ubuntu1
    • 5.15.17+dfsg-1ubuntu2
    • 5.15.18+dfsg-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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