| Name | CVE-2026-1837 |
| 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). |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1128067 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| jpeg-xl (PTS) | bookworm, bookworm (security) | 0.7.0-10+deb12u1 | fixed |
| trixie | 0.11.1-4 | vulnerable |
| forky, sid | 0.11.2-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| jpeg-xl | source | bookworm | (not affected) | | | |
| jpeg-xl | source | (unstable) | 0.11.2-0.1 | | | 1128067 |
Notes
[trixie] - jpeg-xl <no-dsa> (Minor issue; can be fixed via next point release)
[bookworm] - jpeg-xl <not-affected> (Vulnerable code introduced later)
https://github.com/libjxl/libjxl/issues/4549
Introduced by: https://github.com/libjxl/libjxl/commit/f1fd4c384455471f42c006c392ff123c9c1fb1ae (v0.9.0)