{"items":[{"id":"NVI-00017696","kind":"vulnerability","title":"jxl-grid on 32-bit platforms has an out-of-bounds writes due to integer overflow","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-5pmv-rx8r-wmv5","CVE-2026-52834"],"plain_summary":"GitHub lists this reviewed advisory for jxl-grid. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-49ed7a56aa9a021e7e1683a31debd387"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-07-02T20:46:00.000Z","value":"7.3 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-49ed7a56aa9a021e7e1683a31debd387"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-49ed7a56aa9a021e7e1683a31debd387","url":"https://github.com/advisories/GHSA-5pmv-rx8r-wmv5","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-5pmv-rx8r-wmv5","publisher":"GitHub Advisory Database","observed_at":"2026-11-05T03:47:11.081Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-49ed7a56aa9a021e7e1683a31debd387"],"technology":"jxl-grid","known_exclusions":[],"conditions_summary":"### Summary\n\nOn 32-bit platforms, decoding a crafted image may lead to out-of-bounds writes due to integer overflow in length calculation.\n\n### Details & PoC\n\nThe test listed below fail under miri with command `cargo +nightly miri test --release -p jxl-grid`\n\nOr you can use Address Sanitizer, which ignores Rust-specific UB like aliasing but still flags out-of-bounds accesses:\n\n`RUSTFLAGS=-Zsanitizer=address cargo +nightly test -Zbuild-std -p jxl-grid --release --target x86_64-unknown-linux-gnu`\n\nThe following tests should be appended to `crates/jxl-grid/src/test/subgrids.rs`:\n\n```rust\nmod miri_ub {\n    use super::*;\n\n    // `AlignedGrid::with_alloc_tracker` computes `width * height` unchecked. In release, overflow\n    // can create a tiny backing buffer for huge logical dimensions.\n    #[test]\n    fn aligned_grid_dimension_product_overflows() {\n        let width = usize::MAX / 2 + 1;\n        let mut grid = AlignedGrid::::with_alloc_tracker(width, 2, None).unwrap();\n        let mut subgrid = grid.as_subgrid_mut();\n        *subgrid.get_mut(0, 1) = 1;\n        std::hint::black_box(grid);\n    }\n}\n```\n\nThis issue can be reachable through decoding a crafted image in two ways:\n\n1. **Hu","public_affected_ranges":["<= 0.6.1"]}],"null_published_at":"2026-11-05T19:10:21.453Z","source_updated_at":"2026-07-02T20:46:00.000Z","source_disclosed_at":"2026-07-02T20:45:59.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-05T03:47:11.081Z"}],"next_cursor":null,"snapshot_revision":"42594"}