Heap-based Buffer Overflow Affecting strukturag/libheif package, versions [1.22.0, 1.23.1)
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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Start learning- Snyk IDSNYK-UNMANAGED-STRUKTURAGLIBHEIF-19652363
- published9 Sept 2026
- disclosed9 Sept 2026
- creditHarsh Jaiswal
Introduced: 9 Sep 2026
NewCVE-2026-84383 (opens in a new tab)How to fix?
Upgrade strukturag/libheif to version 1.23.1 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow via the HeifPixelImage::scale_nearest_neighbor() path in libheif/image/pixelimage.cc and alpha attachment in libheif/image-items/image_item.cc. An attacker can trigger an out-of-bounds write by supplying a crafted HEIC/HEIF/AVIF file with nested iden and auxl item references that create duplicate Alpha planes with mismatched storage sizes. When the image is decoded and scaled, the scaler allocates the destination Alpha plane using the first plane’s bit depth and then writes later Alpha data as wider samples into that buffer, corrupting heap memory and crashing or hijacking the process.