CVE-2026-58496
CVE-2026-58496 · ThorVG: Out-of-bounds Read in SFNT/TTF Font Loader via Memory API
This page contains facts from public vulnerability sources. Check the original advisory before updating.
Thor Vector Graphics (ThorVG) is a production-ready vector graphics engine. Prior to 1.0.7, the `SFNT/TTF` font loader's `SfntLoader::gen` function in `tvgSfntLoader.cpp` reads `data[0] through data[3]` to identify the font type without first checking that the input buffer contains at least four bytes. Loading an undersized font directly from memory through public APIs such as `tvg::Text::load` causes an out-of-bounds read. Loading through a file path using `mmap` can mask the read because of page alignment; the memory-loading API directly exposes it. Depending on memory layout, a malformed short font may crash the consuming application or disclose adjacent heap memory. This issue is fixed in version 1.0.7.
CVSS 4.3 · Medium · EPSS 0.2%
- Published
- Updated
Stack: system
Affected products and versions
thorvg
- Versions
- < 1.0.7: Affected
No fix published
thorvg Debian:14
- Versions
- 1.0.2+dfsg-1
- 1.0.3+dfsg-1
- 1.0.3+dfsg-2
- 1.0.3+dfsg-3
- 1.0.3+dfsg2-1
- 1.0.3+dfsg2-2
- 1.0.3+dfsg2-3
- 1.0.3+dfsg2-4
- 1.0.6+dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
thorvg Ubuntu:26.10
- Versions
- 1.0.3+dfsg2-4
- 1.0.6+dfsg-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published