Bug 2519703 (CVE-2026-52834)

Summary: CVE-2026-52834 jxl-grid: jxl-grid: Arbitrary code execution via integer overflow
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in jxl-grid, a pure Rust implementation of a JPEG XL decoder. On 32-bit platforms, decoding a specially crafted JPEG XL image can lead to an integer overflow in length calculations. This overflow can cause the allocation of a smaller buffer than required, enabling attacker-controlled out-of-bounds writes. This can result in memory corruption, denial of service, or arbitrary code execution.
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Bug Depends On: 2521934, 2521936, 2521938, 2521940, 2521942, 2521944, 2521946    
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Description OSIDB Bzimport 2026-08-19 15:14:03 UTC 
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.