CVE-2026-40493
CVE-2026-40493 · SAIL has heap buffer overflow in PSD decoder — bpp mismatch in LAB 16-bit mode
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 9.8 · Critical · EPSS 0.4% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
sail
- Versions
- < c930284445ea3ff94451ccd7a57c999eca3bc979: Affected
No fix published
sail Debian:13
- Versions
- 0.9.10-1
- 0.9.10-2
- 0.9.10-3
- 0.9.8-1
- 0.9.8-1+deb13u1
- 0.9.9-1
- 1.2.0-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
sail Debian:14
- Versions
- 0.9.10-1
- 0.9.8-1
- 0.9.9-1
- Affected ranges
- ECOSYSTEM: < 0.9.10-2
Update to 0.9.10-2
sail Ubuntu:24.04:LTS
- Versions
- 0.9.0+repack-1
- 0.9.0+repack-2
- 0.9.0+repack-2.1
- 0.9.0+repack-2.1build1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
sail Ubuntu:25.10
- Versions
- 0.9.7-1build1
- 0.9.8-1
- 0.9.9-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
sail Ubuntu:26.10
- Versions
- 0.9.10-1
- 0.9.10-3
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
sail Ubuntu:26.04:LTS
- Versions
- 0.9.9-1
- 0.9.10-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published