Out-of-bounds Write Affecting sail package, versions <0.9.10-2
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-SAIL-16104345
- published18 Apr 2026
- disclosed18 Apr 2026
Introduced: 18 Apr 2026
CVE-2026-40493 (opens in a new tab)How to fix?
Upgrade Debian:unstable sail to version 0.9.10-2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream sail package and not the sail package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.