A tiling pattern near the int32 boundary spins poppler's Splash renderer
A denial of service flaw was found in Poppler's Splash backend.
- Advisory
- CVE-2026-93653
- Library
- poppler, poppler on Debian
- Published
- Severity
- 5.5 out of 10, as published
- Affected
- poppler, as packaged; see the upstream record
- Fixed in
- see the upstream record
- Reaches you
- by opening a file
What triggers it
Rendering a PDF whose tiling pattern geometry drives an enormous repeat count.
What sillybos does
Needs decoding to detect
The flaw is in the pixel data or the compressed stream, which only a decoder can see. Nothing before the decoder can refuse it; updating the decoder is the fix.
Page content that only the renderer evaluates; nothing a header or pdfinfo shows. A time limit on the renderer turns it into one file's failure.
Proposed from the advisory's text on 2026-11-01, as part of folding the backfill into the record; confirmed by a person on 2026-11-03.
How to protect yourself
In general. Upgrade poppler to a version that has the fix; the upstream record names it.
Specifically. Render PDFs in a boxed process with memory and time limits (see Decoding in a box); nothing read before decoding can see this.
The general advice applies to every row here.
Sources
- https://osv.dev/vulnerability/DEBIAN-CVE-2026-93653
- The record entry, triaged 2026-11-03, last checked 2026-11-03