Public bug reported:
After upgrading libexiv2-27 from version 0.27.6-1build1 to 0.27.6-1ubuntu0.1,
both gThumb and Gwenview immediately crash when opening any JPEG image.
This regression is fully reproducible and disappears when downgrading
libexiv2-27 back to the previous version.
This affects:
gThumb (segmentation fault on startup when loading an image)
Gwenview (fails to resolve RAW MIME types, then crashes)
Dolphin (RAW thumbnails disappear)
Any KDE/GTK application using Exiv2 for metadata parsing
The rest of the system remains stable.
Steps to reproduce
Start from a system with libexiv2-27 version 0.27.6-1build1
(e.g., restored via Timeshift snapshot)
Open any JPEG image with gThumb or Gwenview → works correctly
Run system update:
Codi
sudo apt upgrade
libexiv2-27 is upgraded to 0.27.6-1ubuntu0.1
Open the same image with gThumb or Gwenview → both crash
Actual result
gThumb: segmentation fault
Gwenview: prints dozens of
Unresolved mime type "image/x-..."
then crashes via KCrash
Dolphin: RAW thumbnails no longer generated
Any application using Exiv2 fails to read metadata
Expected result
Applications using Exiv2 should open images normally without crashing.
Workaround
Downgrading Exiv2 fixes the issue:
Codi
sudo apt install libexiv2-27=0.27.6-1build1 libexiv2-dev=0.27.6-1build1
sudo apt-mark hold libexiv2-27 libexiv2-dev
After downgrading, gThumb, Gwenview and Dolphin work perfectly again.
System information
Ubuntu Studio 24.04.4 LTS
KDE Plasma (from Ubuntu Studio)
Qt5 t64 migration completed
KImageFormats 5.115.0
gThumb and Gwenview affected
Hardware: x86_64
Additional notes
The issue is not caused by Qt5, KDE Frameworks, KImageFormats, MIME
database or user configuration.
The regression is isolated to the Exiv2 update.
Timeshift restore confirms the behaviour:
Before update → works
After update → crashes
This suggests an ABI or metadata parsing regression in
0.27.6-1ubuntu0.1.
Attachments (optional)
You can add:
Output of gthumb when crashing
Output of gwenview showing unresolved MIME types
apt history.log snippet showing the Exiv2 upgrade
🔧 On Launchpad, selecciona:
Affect package: exiv2
Ubuntu version: 24.04 (noble)
** Affects: exiv2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2144826
Title:
Regression in libexiv2-27 (0.27.6-1ubuntu0.1) causes gThumb and
Gwenview to crash on Ubuntu 24.04.4 LTS
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