{"id":"JLSEC-2026-574","details":"libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and prior, a crafted HEIF sequence file where the saiz box declares more samples than actually exist in the track's chunk table causes a heap-buffer-overflow (out-of-bounds read) in the SampleAuxInfoReader constructor. The SampleAuxInfoReader constructor iterates over `saiz-\u003eget_num_samples()` samples but doesn't validate that this count is consistent with the number of chunks in the chunks vector. When saiz declares more samples than the chunks cover, the loop increments `current_chunk` past chunks.size(), causing an out-of-bounds read on the chunks vector. The vulnerability is triggered during file parsing (`heif_context_read_from_file`) without any additional user interaction. Any application using libheif to open untrusted HEIF files is affected. This issue has been fixed in version 1.22.0.","modified":"2026-07-25T18:24:39.432618754Z","published":"2026-06-05T15:18:28.412Z","upstream":["CVE-2026-41071","EUVD-2026-31501"],"database_specific":{"license":"CC-BY-4.0","sources":[{"database_specific":{"status":"Analyzed"},"id":"CVE-2026-41071","imported":"2026-07-17T22:10:18.074Z","modified":"2026-06-17T10:46:07.520Z","published":"2026-05-22T22:16:55.470Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-41071","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-41071"},{"published":"2026-05-22T20:59:09Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-31501","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-31501","id":"EUVD-2026-31501","imported":"2026-07-17T22:10:28.124Z","modified":"2026-05-27T13:25:06Z"}]},"references":[{"type":"WEB","url":"https://github.com/strukturag/libheif/releases/tag/v1.22.0"},{"type":"WEB","url":"https://github.com/strukturag/libheif/security/advisories/GHSA-xj92-xjff-h8w3"}],"affected":[{"package":{"name":"libheif_jll","ecosystem":"Julia","purl":"pkg:julia/libheif_jll?uuid=a13778fd-9a17-58b4-b5a0-4b4a242815a9"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.22.2000+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-574.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}