CVE-2026-8454

Imager::File::GIF versions through 1.002 for Perl allow a heap out of bounds (OOB) write on crafted multi-frame GIF files. Imager::File::GIF's i_readgif_multi_low allocates a single per-row buffer GifRow sized for the GIF's global screen width 'SWidth' and reuses it across every image in the file. The page-match branch validates Image.Width + Image.Left > SWidth before each DGifGetLine write, but the parallel skip-image branch at imgif.c:790-805 calls DGifGetLine(GifFile, GifRow, Width) with no such check.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.4

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/tonycoz/imager/commit/782e9c06cc75a0f7eed383f39522f51f44598b04.patch	Patch
https://metacpan.org/release/TONYC/Imager-File-GIF-1.003/source/Changes	Release Notes
http://www.openwall.com/lists/oss-security/2026/05/15/15	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:tonyc:imager\:\:file\:\:gif:*:*:*:*:*:perl:*:*

History

26 Oct 2026, 14:10

Type	Values Removed	Values Added
Summary		(es) Las versiones de Imager::File::GIF hasta la 1.002 para Perl permiten una escritura fuera de límites del montón (OOB) en archivos GIF multifotograma manipulados. La función i_readgif_multi_low de Imager::File::GIF asigna un único búfer por fila, GifRow, dimensionado para el ancho de pantalla global del GIF, ’SWidth’, y lo reutiliza en cada imagen del archivo. La rama de coincidencia de página valida que Image.Width + Image.Left > SWidth antes de cada escritura de DGifGetLine, pero la rama paralela de omisión de imagen en imgif.c:790-805 llama a DGifGetLine(GifFile, GifRow, Width) sin dicha verificación.

Information

Published : 2026-05-15 12:17

Updated : 2026-10-26 14:10

NVD link : CVE-2026-8454

Mitre link : CVE-2026-8454

CVE.ORG link : CVE-2026-8454

JSON object : View

Products Affected

tonyc

imager\

CWE

CWE-787

Out-of-bounds Write

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