Bug 2484837 (CVE-2026-40930) - CVE-2026-40930 libpng: libpng: Data integrity and availability impact due to improper APNG chunk handling
Summary: CVE-2026-40930 libpng: libpng: Data integrity and availability impact due to ...
Keywords:
Status: NEW
Alias: CVE-2026-40930
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-04 16:02 UTC by OSIDB Bzimport
Modified: 2026-08-31 10:49 UTC (History)
32 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-06-04 16:02:05 UTC 
LIBPNG is a reference library for use in applications that process PNG (Portable Network Graphics) raster image files. In version 1.8.0, three inter-frame chunk discard paths in the push-mode APNG parser clear the chunk-header flag without consuming the chunk body and CRC, allowing attacker-controlled bytes inside an ignored ancillary chunk to be reinterpreted as a fresh chunk header on the next call to `png_process_data`. Commit faf06924688b62d7c1654b5ceddedbde66ffadb4 fixes the issue.
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