Vulnerability · Published Aug 19, 2026 · Assigned by GitHub_M
CVE-2026-52834jxl-oxide: Out-of-bounds writes due to integer overflow in jxl-grid on 32-bit platforms
High 7.3
In plain English
A high-severity heap buffer overflow in jxl-grid from tirr-c. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Official description
jxl-oxide is a pure Rust implementation of a JPEG XL decoder. Prior to jxl-grid 0.6.2, decoding a crafted JPEG XL image on a 32-bit platform can overflow length calculations in AlignedGrid::with_alloc_tracker and related grid and subgrid arithmetic. A 65536 x 65536 frame can pass the frame-area limit while overflowing the usize element count, causing modular, VarDCT, or filter rendering paths to allocate a backing buffer smaller than the logical grid. A tiny bitstream-controlled cropped frame combined with a huge canvas or requested region can also reach the vulnerable composition path in crates/jxl-render/src/blend.rs through ordinary render_frame(). Later mutable subgrid and raw-pointer operations can then perform attacker-controlled out-of-bounds writes, causing memory corruption, denial of service, or arbitrary code execution. This issue is fixed in jxl-grid version 0.6.2.
Affected products (as reported)
Weakness: CWE-122, CWE-131, CWE-190 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:H
References
- https://github.com/tirr-c/jxl-oxide/security/advisories/GHSA-5pmv-rx8r-wmv5 x_refsource_CONFIRM
- https://github.com/tirr-c/jxl-oxide/commit/3986dadd3926a95656a642e74a0702d52f5c92e2 x_refsource_MISC
- https://github.com/tirr-c/jxl-oxide/releases/tag/0.12.6 x_refsource_MISC
- https://rustsec.org/advisories/RUSTSEC-2026-0151.html x_refsource_MISC