CVE-2026-1837
Publication date 11 February 2026
Last updated 2 April 2026
Ubuntu priority
Description
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).
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| jpeg-xl | 25.10 questing |
Fixed 0.11.1-6ubuntu1.1
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy | Not in release |
References
Related Ubuntu Security Notices (USN)
- USN-8146-1
- libjxl vulnerability
- 2 April 2026