{"id":"UBUNTU-CVE-2026-110596","details":"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.","modified":"2026-10-17T12:58:03.401189436Z","published":"2026-10-15T00:00:00Z","upstream":["CVE-2026-110596"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-110596"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-110596"},{"type":"REPORT","url":"https://github.com/dlbeer/quirc/blob/542848dd6b9b0eaa9587bbf25b9bc67bd8a71fca/lib/identify.c#L578-L636"},{"type":"REPORT","url":"https://github.com/dlbeer/quirc/issues/162"},{"type":"REPORT","url":"https://github.com/dlbeer/quirc/pull/159"},{"type":"REPORT","url":"https://hackmd.io/@haind-pwn/quirc-alignment-pattern-infinite-loop-dos"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/quirc-through-1.2-denial-of-service-via-find-alignment-pattern-spiral-search"}],"affected":[{"package":{"name":"quirc","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/quirc?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.2-1","binary_name":"libquirc1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-110596.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"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"},{"type":"Ubuntu","score":"medium"}]}