jxl-oxide: Out-of-bounds writes due to integer overflow in jxl-grid on 32-bit platforms (CVE-2026-52834) | HOL Guard CVE

High severityCVE-2026-52834GHSA-5PMV-RX8R-WMV5

jxl-oxide: Out-of-bounds writes due to integer overflow in jxl-grid on 32-bit platforms

Answer in brief

CVE-2026-52834 records a High severity vulnerability in jxl-oxide: Out-of-bounds writes due to integer overflow in jxl-grid on 32-bit platforms. The current sources do not mark it as known exploited. The current feed maps tirr-c/jxl-grid (generic), tirr-c/jxl-oxide (generic), jxl-grid (rust). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 19, 2026Updated Aug 19, 2026Source checked Aug 19, 2026First seen by HOL Jul 2, 2026Material review Aug 19, 2026

Upstream Advisory

Key facts

Risk: High
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps tirr-c/jxl-grid (generic), tirr-c/jxl-oxide (generic), jxl-grid (rust). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
tirr-c/jxl-gridgeneric	< 0.6.2	Not reported
tirr-c/jxl-oxidegeneric	< 0.12.6	Not reported
jxl-gridrust	<=0.6.1	0.6.2

Recommended response

Check inventory. Check lockfiles and deployed manifests for tirr-c/jxl-grid, tirr-c/jxl-oxide, jxl-grid.
Review the reported fix. Update jxl-grid to 0.6.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 2, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.