CVE-2026-1837
CVE-2026-1837 · libjxl: Out-of-bounds write in grayscale color transformation when using LCMS2
This page contains facts from public vulnerability sources. Check the original advisory before updating.
A specially-crafted file can cause libjxl's decoder to write pixel data to uninitialized unallocated memory. Soon after that data from another uninitialized unallocated region is copied to pixel data. This can be done by requesting color transformation of grayscale images to another grayscale color space. Buffers allocated for 1-float-per-pixel are used as if they are allocated for 3-float-per-pixel. That happens only if LCMS2 is used as CMS engine. There is another CMS engine available (selected by build flags).
CVSS 8.7 · High · EPSS 0.3% · Fix available
- Published
- Updated
Stack: system
Affected products and versions
libjxl
- Versions
- ≥ 0.9, ≤ 0.11.1: Affected (semver)
No fix published
jpeg-xl Debian:13
- Versions
- 0.11.1-4
- 0.11.1-5
- 0.11.1-6
- Affected ranges
- ECOSYSTEM: < 0.11.2-0.1~deb13u1
Update to 0.11.2-0.1~deb13u1
jpeg-xl Debian:14
- Versions
- 0.11.1-4
- 0.11.1-5
- 0.11.1-6
- 0.11.2-0.1~deb13u1
- 0.11.2-0.1~deb13u2
- Affected ranges
- ECOSYSTEM: < 0.11.2-0.1
Update to 0.11.2-0.1
jpeg-xl Ubuntu:25.10
- Versions
- 0.11.1-4
- 0.11.1-6ubuntu1
- Affected ranges
- ECOSYSTEM: < 0.11.1-6ubuntu1.1
Update to 0.11.1-6ubuntu1.1