p PatchFirst

CVE-2025-5455

CVE-2025-5455 · Possible denial of service when passing malformed data in a URL to qDecodeDataUrl

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

An issue was found in the private API function qDecodeDataUrl() in QtCore, which is used in QTextDocument and QNetworkReply, and, potentially, in user code. If the function was called with malformed data, for example, an URL that contained a "charset" parameter that lacked a value (such as "data:charset,"), and Qt was built with assertions enabled, then it would hit an assertion, resulting in a denial of service (abort). This impacts Qt up to 5.15.18, 6.0.0->6.5.8, 6.6.0->6.8.3 and 6.9.0. This has been fixed in 5.15.19, 6.5.9, 6.8.4 and 6.9.1.

CVSS 8.4 · High · EPSS 0.4% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • qt

    Versions
    • ≥ 0, ≤ 5.15.18: Affected (python)
    • ≥ 6.0.0, ≤ 6.5.8: Affected (python)
    • 6.5.9: Not affected (python)
    • ≥ 6.6.0, ≤ 6.8.3: Affected (python)
    • 6.8.4: Not affected (python)
    • 6.9.0: Affected (python)
    • 6.9.1: Not affected (python)

    No fix published

  • 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
    • 6.4.2+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-8

    Update to 6.8.2+dfsg-8

  • qt6-base Debian:14

    Affected ranges
    • ECOSYSTEM: < 6.8.2+dfsg-8

    Update to 6.8.2+dfsg-8

  • 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
    • 5.15.8+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

    Affected ranges
    • ECOSYSTEM: < 5.15.15+dfsg-6

    Update to 5.15.15+dfsg-6

  • qtbase-opensource-src Debian:14

    Affected ranges
    • ECOSYSTEM: < 5.15.15+dfsg-6

    Update to 5.15.15+dfsg-6

  • 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-gles Ubuntu:16.04:LTS

    Versions
    • 5.4.2+dfsg-2ubuntu9
    • 5.5.1+dfsg-6ubuntu1
    • 5.5.1+dfsg-10ubuntu1
    • 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-16ubuntu4
    • 5.5.1+dfsg-16ubuntu5
    • 5.5.1+dfsg-16ubuntu6
    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

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

    Versions
    • 5.12.4+dfsg-1build1
    • 5.12.5+dfsg-1
    • 5.12.5+dfsg-2
    • 5.12.8+dfsg-0ubuntu1
    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: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
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

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

    Versions
    • 5.15.2+dfsg-4
    • 5.15.2+dfsg-5
    • 5.15.3+dfsg-1
    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: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
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

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

    Versions
    • 5.15.10+dfsg-2
    • 5.15.10+dfsg-3
    • 5.15.12+dfsg-1
    • 5.15.12+dfsg-1ubuntu1
    • 5.15.12+dfsg-1ubuntu2
    • 5.15.13+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qt6-base Ubuntu:25.10

    Versions
    • 6.8.3+dfsg-0ubuntu2
    • 6.8.3+dfsg-0ubuntu3
    • 6.9.2+dfsg-1ubuntu1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src-gles Ubuntu:25.10

    Versions
    • 5.15.15+dfsg-2
    • 5.15.17+dfsg-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qt6-base Ubuntu:26.10

    Versions
    • 6.10.2+dfsg-7
    • 6.10.2+dfsg-14ubuntu2
    • 6.10.2+dfsg-15
    • 6.10.2+dfsg-16
    • 6.11.2+dfsg-4ubuntu2
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src-gles Ubuntu:26.10

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

    No fix published

  • qt6-base Ubuntu:26.04:LTS

    Versions
    • 6.9.2+dfsg-1ubuntu1
    • 6.9.2+dfsg-2
    • 6.9.2+dfsg-3ubuntu1
    • 6.9.2+dfsg-3ubuntu2
    • 6.9.2+dfsg-4
    • 6.10.2+dfsg-3
    • 6.10.2+dfsg-6
    • 6.10.2+dfsg-7
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • qtbase-opensource-src-gles Ubuntu:26.04:LTS

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

    No fix published

Original sources

Check your server →