CVE-2026-110596

medium

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.

References

https://www.vulncheck.com/advisories/quirc-through-1.2-denial-of-service-via-find-alignment-pattern-spiral-search

https://hackmd.io/@haind-pwn/quirc-alignment-pattern-infinite-loop-dos

https://github.com/dlbeer/quirc/pull/159

https://github.com/dlbeer/quirc/issues/162

https://github.com/dlbeer/quirc/blob/542848dd6b9b0eaa9587bbf25b9bc67bd8a71fca/lib/identify.c#L578-L636

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101224

Details

Source: Mitre, NVD

Published: 2026-10-14

Updated: 2026-10-16

Risk Information

CVSS v2

Base Score: 4.9

Vector: CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.5

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Severity: Medium

CVSS v4

Base Score: 6.8

Vector: 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

Severity: Medium

EPSS

EPSS: 0.00172