Looks like to be the QT libs that are impacted. For Opensnitch, that’s the Qt5 lib that crashes.
(lots of other calls, but python-related for the application)
Current thread 0x00007fb0dff57b80 [opensnitch-ui] (most recent call first):
File "/usr/lib/python3.14/site-packages/opensnitch/dialogs/prompt/_details.py", line 50 in render
File "/usr/lib/python3.14/site-packages/opensnitch/dialogs/prompt/__init__.py", line 335 in on_connection_prompt_triggered
File "/usr/bin/opensnitch-ui", line 272 in <module>
Current thread's C stack trace (most recent call first):
Binary file "/usr/lib/libpython3.14.so.1.0", at _Py_DumpStack+0x4d [0x7fb0df967a88]
Binary file "/usr/lib/libpython3.14.so.1.0", at +0x16cd1c [0x7fb0df96cd1c]
Binary file "/usr/lib/libc.so.6", at +0x3e8f0 [0x7fb0df43e8f0]
Binary file "/usr/lib/libfontconfig.so.1", at +0xe9ac [0x7fb0d43be9ac]
Binary file "/usr/lib/libfontconfig.so.1", at FcCharSetHasChar+0x22 [0x7fb0d43c0902]
Binary file "/usr/lib/libQt5XcbQpa.so.5", at +0xae95e [0x7fb0d44bb95e]
Binary file "/usr/lib/libQt5Gui.so.5", at _ZNK16QFontEngineMulti12stringToCMapEPK5QChariP12QGlyphLayoutPi6QFlagsIN11QFontEngine10ShaperFlagEE+0x582 [0x7fb0dda10fa2]
Binary file "/usr/lib/libQt5Gui.so.5", at _ZNK11QTextEngine9shapeTextEi+0x34c [0x7fb0dda2fc6c]
Binary file "/usr/lib/libQt5Gui.so.5", at _ZN9QTextLine13layout_helperEi+0x284 [0x7fb0dda42c34]
Binary file "/usr/lib/libQt5Widgets.so.5", at _ZN24QPlainTextDocumentLayout11layoutBlockERK10QTextBlock+0x17b [0x7fb0de33883b]
Binary file "/usr/lib/libQt5Widgets.so.5", at _ZNK24QPlainTextDocumentLayout17blockBoundingRectERK10QTextBlock+0xbc [0x7fb0de338c7c]
Binary file "/usr/lib/libQt5Widgets.so.5", at +0x33a28d [0x7fb0de33a28d]
Binary file "/usr/lib/libQt5Widgets.so.5", at +0x364739 [0x7fb0de364739]
Binary file "/usr/lib/libQt5Widgets.so.5", at +0x36e1a7 [0x7fb0de36e1a7]
Binary file "/usr/lib/libQt5Widgets.so.5", at +0x3653ba [0x7fb0de3653ba]
Binary file "/usr/lib/libQt5Widgets.so.5", at _ZN18QWidgetTextControl10moveCursorEN11QTextCursor13MoveOperationENS0_8MoveModeE+0x8a [0x7fb0de3716ea]
Binary file "/usr/lib/python3.14/site-packages/PyQt5/QtWidgets.abi3.so", at +0x169608 [0x7fb0de969608]
Binary file "/usr/lib/libpython3.14.so.1.0", at +0x1d50eb [0x7fb0df9d50eb]
Binary file "/usr/lib/libpython3.14.so.1.0", at +0x1a456a [0x7fb0df9a456a]
Binary file "/usr/lib/libpython3.14.so.1.0", at +0x5e2a1 [0x7fb0df85e2a1]
Binary file "/usr/lib/libpython3.14.so.1.0", at +0x1e24eb [0x7fb0df9e24eb]
Binary file "/usr/lib/libpython3.14.so.1.0", at +0x23438e [0x7fb0dfa3438e]
Binary file "/usr/lib/python3.14/site-packages/PyQt5/QtCore.abi3.so", at +0x1ad0b7 [0x7fb0da1ad0b7]
Binary file "/usr/lib/python3.14/site-packages/PyQt5/QtCore.abi3.so", at +0x1ad99f [0x7fb0da1ad99f]
Binary file "/usr/lib/python3.14/site-packages/PyQt5/QtWidgets.abi3.so", at +0x2c4f2c [0x7fb0deac4f2c]
Binary file "/usr/lib/libQt5Core.so.5", at _ZN7QObject5eventEP6QEvent+0x30f [0x7fb0dd50417f]
Binary file "/usr/lib/python3.14/site-packages/PyQt5/QtWidgets.abi3.so", at +0x2c32ac [0x7fb0deac32ac]
Binary file "/usr/lib/libQt5Widgets.so.5", at _ZN19QApplicationPrivate13notify_helperEP7QObjectP6QEvent+0x97 [0x7fb0de1583a7]
Binary file "/usr/lib/python3.14/site-packages/PyQt5/QtWidgets.abi3.so", at +0x2dad27 [0x7fb0deadad27]
Binary file "/usr/lib/libQt5Core.so.5", at _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent+0x138 [0x7fb0dd4d8068]
Binary file "/usr/lib/libQt5Core.so.5", at _ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData+0x1be [0x7fb0dd4dd7ce]
Binary file "/usr/lib/libQt5Core.so.5", at +0x330890 [0x7fb0dd530890]
<truncated rest of calls>
Extension modules: PyQt5.QtCore, PyQt5.QtGui, PyQt5.QtWidgets, PyQt5.QtNetwork, grpc._cython.cygrpc, PyQt5.QtSql, markupsafe._speedups, google._upb._message, PyQt5.QtXmlPatterns, PyQt5.QtXml, PyQt5.QtX11Extras, PyQt5.QtTextToSpeech, PyQt5.QtTest, PyQt5.QtSvg, PyQt5.QtSerialPort, PyQt5.QtQml, PyQt5.QtQuick, PyQt5.QtQuickWidgets, PyQt5.QtPrintSupport, PyQt5.QtOpenGL, PyQt5.QtMultimedia, PyQt5.QtMultimediaWidgets, PyQt5.QtHelp, PyQt5.QtDesigner, PyQt5.QtDBus, _dbus_bindings, _dbus_glib_bindings, pyasn.pyasn_radix, ujson (total: 29)
[1] 12127 segmentation fault (core dumped) opensnitch-ui --debug
Edit : qt5 and 6 libs were in the upgrade batch.
[2026-06-28T08:37:04+0200] [ALPM] upgraded qt6-declarative (6.11.1-2 -> 6.11.1-3)
[2026-06-28T08:37:05+0200] [ALPM] upgraded qt6-webengine (6.11.1-1 -> 6.11.1-3)
[2026-06-28T08:37:09+0200] [ALPM] upgraded kvantum-qt5 (1.1.7-1 -> 1.1.8-1)
[2026-06-28T08:37:29+0200] [ALPM] upgraded qt5ct (1.9-1 -> 1.9-2)
[2026-06-28T08:37:30+0200] [ALPM] upgraded qt6-tools (6.11.1-1 -> 6.11.1-3)
[2026-06-28T08:37:37+0200] [ALPM] upgraded vlc-gui-qt (3.0.22-4 -> 3.0.23_2-7)
I’m on X11 session BTW.