DEBIAN-CVE-2026-73639
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-73639
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-73639.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-73639
- Upstream
- Published
- 2026-09-17T22:17:03Z
- Modified
- 2026-09-19T23:00:25Z
- Summary
- [none]
- Details
-
Imager::File::PNG versions from 1.003 before 1.004 for Perl write past the end of the row buffer reading a PNG with a tRNS transparency chunk in read_direct8. With a tRNS chunk, read_direct8() adds an alpha channel to the image it creates but still sizes the row buffer from the original channel count. libpng expands the transparency into that extra channel, so png_read_row() fills one channel more than the buffer holds, at one byte per sample, and writes width bytes past the end of the allocation. Palette images go to read_paletted() and 16-bit images to read_direct16(), which sizes its buffer from png_get_rowbytes() and allocates enough for the expanded row. The same reader ships bundled in the Imager distribution. Reading an attacker-supplied PNG through Imager->read() corrupts the heap, which can crash the process.
- References
Affected packages
Debian:12 / libimager-perl
Package
- Name
- libimager-perl
- Purl
- pkg:deb/debian/libimager-perl?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / libimager-perl
Package
- Name
- libimager-perl
- Purl
- pkg:deb/debian/libimager-perl?arch=source&distro=trixie
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:14 / libimager-perl
Package
- Name
- libimager-perl
- Purl
- pkg:deb/debian/libimager-perl?arch=source&distro=forky
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed1.035+dfsg-1