CVE-2026-40493

CRITICAL

9.8

Description

SAIL is a cross-platform library for loading and saving images with support for animation, metadata, and ICC profiles. Prior to commit c930284445ea3ff94451ccd7a57c999eca3bc979, the PSD codec computes bytes-per-pixel (`bpp`) from raw header fields `channels * depth`, but the pixel buffer is allocated based on the resolved pixel format. For LAB mode with `channels=3, depth=16`, `bpp = (3*16+7)/8 = 6`, but the format `BPP40_CIE_LAB` allocates only 5 bytes per pixel. Every pixel write overshoots, causing a deterministic heap buffer overflow on every row. Commit c930284445ea3ff94451ccd7a57c999eca3bc979 contains a patch.

Details CVE

Score CVSS v3.19.8

SeveriteCRITICAL

Vecteur CVSSCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vecteur d'attaqueNETWORK

ComplexiteLOW

Privileges requisNONE

Interaction utilisateurNONE

Publie4/18/2026

Derniere modification4/20/2026

Sourcenvd

Observations honeypot0

Faiblesses (CWE)

CWE-787

References

https://github.com/HappySeaFox/sail/commit/c930284445ea3ff94451ccd7a57c999eca3bc979(security-advisories@github.com)

https://github.com/HappySeaFox/sail/security/advisories/GHSA-rcqx-gc76-r9mv(security-advisories@github.com)

Correlations IOC

Aucune correlation enregistree

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