medium5.5
CVE-2026-110596
quirc through 1.2 contains an excessive-iteration vulnerability in find_alignment_pattern() in lib/identify.c that allows attackers to hang quirc_end() with a …
Impact
quirc through 1.2 contains an excessive-iteration vulnerability in find_alignment_pattern() in lib/identify.c that allows attackers to hang quirc_end() with a crafted image. Attackers can arrange three finder patterns producing a near-degenerate perspective transform, causing billions of region_code() iterations that exhaust CPU in applications decoding attacker-supplied QR images.
Affected products
| Product | Affected versions |
|---|---|
| Quirc | through 1.2 |
Versions were read from the advisory text. No structured product data has been published for this record yet.
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/dlbeer/quirc/blob/542848dd6b9b0eaa9587bbf25b9bc67bd8a71fca/lib/identify.c#L578-L636
- https://github.com/dlbeer/quirc/issues/162
- https://github.com/dlbeer/quirc/pull/159
- https://hackmd.io/@haind-pwn/quirc-alignment-pattern-infinite-loop-dos
- https://www.vulncheck.com/advisories/quirc-through-1.2-denial-of-service-via-find-alignment-pattern-spiral-search