{"id":"JLSEC-2026-949","summary":"ImageMagick has Division-by-Zero in YUV sampling factor validation, which leads to crash","details":"A logic error in YUV sampling factor validation allows an invalid sampling factor to bypass checks and trigger a division-by-zero during image loading, resulting in a reliable denial-of-service.\n\n```\ncoders/yuv.c:210:47: runtime error: division by zero\nAddressSanitizer:DEADLYSIGNAL\n=================================================================\n==3543373==ERROR: AddressSanitizer: UNKNOWN SIGNAL on unknown address 0x000000000000 (pc 0x55deeb4d723c bp 0x7fffc28d34d0 sp 0x7fffc28d3320 T0)\n    #0 0x55deeb4d723c in ReadYUVImage coders/yuv.c:210\n    #1 0x55deeb751dff in ReadImage MagickCore/constitute.c:743\n    #2 0x55deeb756374 in ReadImages MagickCore/constitute.c:1082\n    #3 0x55deec682375 in CLINoImageOperator MagickWand/operation.c:4959\n    #4 0x55deec6887ed in CLIOption MagickWand/operation.c:5473\n    #5 0x55deec32843b in ProcessCommandOptions MagickWand/magick-cli.c:653\n    #6 0x55deec32b99b in MagickImageCommand MagickWand/magick-cli.c:1392\n    #7 0x55deec324d58 in MagickCommandGenesis MagickWand/magick-cli.c:177\n    #8 0x55deead82519 in MagickMain utilities/magick.c:162\n    #9 0x55deead828be in main utilities/magick.c:193\n    #10 0x7fb90807fd8f in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58\n    #11 0x7fb90807fe3f in __libc_start_main_impl ../csu/libc-start.c:392\n    #12 0x55deead81974 in _start (/data/ylwang/LargeScan/targets/ImageMagick/utilities/magick+0x22fb974)\n\nAddressSanitizer can not provide additional info.\nSUMMARY: AddressSanitizer: UNKNOWN SIGNAL coders/yuv.c:210 in ReadYUVImage\n==3543373==ABORTING\n```","modified":"2026-07-30T18:35:35.612493939Z","published":"2026-07-30T16:02:27.435Z","upstream":["CVE-2026-25799","EUVD-2026-7441","GHSA-543g-8grm-9cw6"],"database_specific":{"license":"CC-BY-4.0","sources":[{"modified":"2026-06-17T10:25:15.923Z","published":"2026-02-24T01:16:14.763Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-25799","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25799","database_specific":{"status":"Analyzed"},"id":"CVE-2026-25799","imported":"2026-07-30T14:08:45.059Z"},{"published":"2026-02-24T15:37:53Z","url":"https://api.github.com/advisories/GHSA-543g-8grm-9cw6","html_url":"https://github.com/advisories/GHSA-543g-8grm-9cw6","id":"GHSA-543g-8grm-9cw6","imported":"2026-07-30T14:10:42.885Z","modified":"2026-02-24T15:37:56Z"},{"html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-7441","id":"EUVD-2026-7441","imported":"2026-07-30T14:08:55.191Z","modified":"2026-02-26T15:22:25Z","published":"2026-02-24T01:05:39Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-7441"}]},"references":[{"type":"WEB","url":"https://github.com/ImageMagick/ImageMagick/commit/49000e7298fbfdd759ac2c46f740f40c2e9b7452"},{"type":"WEB","url":"https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-543g-8grm-9cw6"},{"type":"WEB","url":"https://github.com/advisories/GHSA-543g-8grm-9cw6"},{"type":"WEB","url":"https://github.com/dlemstra/Magick.NET/releases/tag/14.10.3"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-25799"}],"affected":[{"package":{"name":"ImageMagick_jll","ecosystem":"Julia","purl":"pkg:julia/ImageMagick_jll?uuid=c73af94c-d91f-53ed-93a7-00f77d67a9d7"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"7.1.2023+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-949.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}],"credits":[{"name":"ylwango613","contact":["https://github.com/ylwango613"],"type":"REPORTER"}]}