Bug 2438669 - CVE-2026-25646 libpng: LIBPNG has a heap buffer overflow in png_set_quantize [fedora-42]
Summary: CVE-2026-25646 libpng: LIBPNG has a heap buffer overflow in png_set_quantize ...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: libpng
Version: 42
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Nikola Forró
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["8a67ee5b-874a-49c3-aeec-d...
Depends On:
Blocks: CVE-2026-25646
TreeView+ depends on / blocked
 
Reported: 2026-02-10 19:32 UTC by Jon Moroney
Modified: 2026-02-18 00:56 UTC (History)
3 users (show)

Fixed In Version: libpng-1.6.55-1.fc43 libpng-1.6.55-1.fc42
Clone Of:
Environment:
Last Closed: 2026-02-17 00:56:19 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)

Description Jon Moroney 2026-02-10 19:32:07 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Comment 1 Fedora Update System 2026-02-13 20:47:51 UTC 
FEDORA-2026-a9ae661fa2 (libpng-1.6.55-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-a9ae661fa2
Comment 2 Fedora Update System 2026-02-13 20:47:58 UTC 
FEDORA-2026-168ebcb4a8 (libpng-1.6.55-1.fc42) has been submitted as an update to Fedora 42.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-168ebcb4a8
Comment 3 Fedora Update System 2026-02-14 00:53:57 UTC 
FEDORA-2026-168ebcb4a8 has been pushed to the Fedora 42 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-168ebcb4a8`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-168ebcb4a8

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 4 Fedora Update System 2026-02-14 01:30:24 UTC 
FEDORA-2026-a9ae661fa2 has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-a9ae661fa2`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-a9ae661fa2

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.
Comment 5 Fedora Update System 2026-02-17 00:56:19 UTC 
FEDORA-2026-a9ae661fa2 (libpng-1.6.55-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.
Comment 6 Fedora Update System 2026-02-18 00:56:24 UTC 
FEDORA-2026-168ebcb4a8 (libpng-1.6.55-1.fc42) has been pushed to the Fedora 42 stable repository.
If problem still persists, please make note of it in this bug report.
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