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CVE-2026-40493

SAIL has heap buffer overflow in PSD decoder — bpp mismatch in LAB 16-bit mode PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
HappySeaFox / sailaffected < c930284445ea3ff94451ccd7a57c999eca3bc979

CWE

CWE-787

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.