CVE-2026-110596
quirc through 1.2 Denial of Service via find_alignment_pattern Spiral Search
- State
- Published
- Severity
- 6.8 Medium
- Published
- Oct 14, 2026
- Updated
- Oct 20, 2026
- Reserved
- Oct 14, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.8 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 5.5 Medium | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-834 Excessive Iteration
Affected Products
| Product | Versions |
|---|---|
quircdlbeer |
|
References
- https://github.com/dlbeer/quirc/pull/159issue-trackingpatch
- https://github.com/dlbeer/quirc/issues/162issue-tracking
- https://hackmd.io/@haind-pwn/quirc-alignment-pattern-infinite-loop-dosthird-party-advisory
- https://github.com/dlbeer/quirc/blob/542848dd6b9b0eaa9587bbf25b9bc67bd8a71fca/lib/identify.c#L578-L636technical-description
- VulnCheck Advisory: quirc through 1.2 Denial of Service via find_alignment_pattern Spiral Searchthird-party-advisory
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