CVE-2025-5455

Qt is a software toolkit for developing applications.

Security Fix(es):

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.(CVE-2025-5455)

Qt is a software toolkit for developing applications.

Security Fix(es):

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.(CVE-2025-5455)

Qt is a software toolkit for developing applications.

Security Fix(es):

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.(CVE-2025-5455)

Qt is a software toolkit for developing applications.

Security Fix(es):

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.(CVE-2025-5455)

Qt is a software toolkit for developing applications. The qt5-base packages contain base tools for string, xml, and network handling in Qt.

Security Fix(es):

• qt5: qt6: QtCore Assertion Failure Denial of Service (CVE-2025-5455)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Qt is a software toolkit for developing applications. This package contains base tools, like string, xml, and network handling.

Security Fix(es):

• qt5: qt6: QtCore Assertion Failure Denial of Service (CVE-2025-5455)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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.

Qt is a software toolkit for developing applications. The qt5-base packages contain base tools for string, xml, and network handling in Qt.

Security Fix(es):

• qt5: qt6: QtCore Assertion Failure Denial of Service (CVE-2025-5455)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Qt is a software toolkit for developing applications. This package contains base tools, like string, xml, and network handling.

Security Fix(es):

• qt5: qt6: QtCore Assertion Failure Denial of Service (CVE-2025-5455)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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.

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.

• CVE-2025-5455: fix qDecodeDataUrl crash on malformed data URL with charset
• CVE-2024-25580: fix KTX file reading buffer overflow
• CVE-2024-39936: delay HTTP/2 communication until encrypted() can be responded to (includes prerequisite to emit encrypted() on H2 path)

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.

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.

These are all security issues fixed in the libQt5Bootstrap-devel-static-32bit-5.15.17+kde122-2.1 package on the GA media of openSUSE Tumbleweed.

This update for libqt4 fixes the following issues:

• CVE-2021-45930: Fixed out-of-bounds write leading to DoS (bsc#1196654)
• CVE-2023-32573: Fixed missing initialization of QtSvg QSvgFont m_unitsPerEm (bsc#1211298)
• CVE-2023-32763: Fixed buffer overflow on QTextLayout during rendering of an SVG file with an image inside (bsc#1211798)
• CVE-2023-34410: Fixed certificate validation not always considering whether the root of a chain is a configured CA certificate (bsc#1211994)
• CVE-2023-37369: Fixed buffer overflow in QXmlStreamReader (bsc#1214327)
• CVE-2023-38197: Fixed infinite loops in QXmlStreamReader (bsc#1213326)
• CVE-2025-5455: Fixed denial of service when qDecodeDataUrl() is called with malformed data and assertions are enabled (bsc#1245609)

This update for qt6-base fixes the following issues:

• CVE-2025-5455: processing of malformed data in qDecodeDataUrl() can trigger assertion and cause a crash (bsc#1243958).
• CVE-2025-30348: complex algorithm used in encodeText in QDom when processing XML data can cause low performance (bsc#1239896).

This update for libqt5-qtbase fixes the following issues:

Security issues fixed:

• CVE-2025-5455: processing of malformed data in qDecodeDataUrl() can trigger assertion and cause a crash (bsc#1243958).
• CVE-2025-30348: complex algorithm used in encodeText in QDom when processing XML data can cause low performance (bsc#1239896).

Other issues fixed:

• Initialize a member variable in QObjectPrivate::Signal that was uninitialized under some circumstances.
• Fix a crash when parsing a particular glyph in a particular font.
• Avoid repeatedly registering xsettings callbacks when switching cursor themes.
• Check validity of RandR output info before using it.
• Fix reparenting a window so it takes effect even if there are no other state changes to the window.