AIKIDO-2026-383628
pdf_oxide is vulnerable to Denial of Service (DoS)
59
Medium Risk
This Affects:
pdf_oxideTL;DR
The reading-order text extraction pipeline groups vertical-writing (tategaki) spans into columns with a pairwise |a - b| <= tol X-center comparator that is not transitive. When a malformed or scanned CJK PDF produces many narrow spans whose centers step within the tolerance, the comparator reports contradictory orderings and Rust's sort_by/sort_unstable_by panics with a total-order violation that is uncatchable across FFI bindings and aborts the host process. Oversized real-number literals that saturate to f64::INFINITY can also feed NaN glyph coordinates into the same sort path and reach the crash. The fix replaces the comparator with single-linkage column clustering that yields a genuine total order and clamps oversized literals to the spec limit at parse time.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you extract text from untrusted or scanned PDFs.
Background info
pdf_oxide is vulnerable to Denial of Service (DoS) in versions 0.3.61 - 0.3.72.
How to fix this
Upgrade the pdf_oxide library to the patch version.
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