{"id":"CVE-2025-62821","aliases":["EUVD-2025-210287","GHSA-4qq3-gjhp-4grf"],"status":"published","title":"Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because...","description":"Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because CHEIFItemInfoEntry_GetDataSize can return success while leaving the reported data size as 0. This causes a caller to make a 1-byte allocation. Later, CopyPixels computes copy_size = stride * abs(roi_height) but does not check the source buffer length before a memmove call.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-10","score":0.01052,"percentile":0.64617,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-125"],"published":"2026-06-19T00:00:00Z","modified":"2026-10-12T22:10:00Z","exploits":[{"source":"pocgithub","id":"hyunjungg/CVE-2025-62821","title":"hyunjungg/CVE-2025-62821","date":"2025-09-25","url":"https://github.com/hyunjungg/CVE-2025-62821"}],"products":[{"vendor":"microsoft","product":"heif_image_extension"}],"references":[{"url":"https://github.com/hyunjungg/CVE-2025-62821","tags":["exploit","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-62821"},{"url":"https://github.com/advisories/GHSA-4qq3-gjhp-4grf"}],"sources":{"cve":[{"id":"CVE-2025-62821","description":"Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because CHEIFItemInfoEntry_GetDataSize can return success while leaving the reported data size as 0. This causes a caller to make a 1-byte allocation. Later, CopyPixels computes copy_size = stride * abs(roi_height) but does not check the source buffer length before a memmove call.","status":"published","published":"2026-06-19T00:00:00Z","modified":"2026-06-22T17:16:13.925Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:32:54.87586Z"}],"euvd":[{"id":"EUVD-2025-210287","description":"Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because CHEIFItemInfoEntry_GetDataSize can return success while leaving the reported data size as 0. This causes a caller to make a 1-byte allocation. Later, CopyPixels computes copy_size = stride * abs(roi_height) but does not check the source buffer length before a memmove call.","status":"published","published":"2026-06-19T00:00:00Z","modified":"2026-06-22T17:16:13Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T18:20:34.238696Z"}],"ghsa":[{"id":"GHSA-4qq3-gjhp-4grf","title":"Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because...","description":"Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because CHEIFItemInfoEntry_GetDataSize can return success while leaving the reported data size as 0. This causes a caller to make a 1-byte allocation. Later, CopyPixels computes copy_size = stride * abs(roi_height) but does not check the source buffer length before a memmove call.","status":"published","published":"2026-06-19T15:33:15Z","modified":"2026-06-22T18:35:09Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T15:08:56.309175Z"}],"nvd":[{"id":"CVE-2025-62821","description":"Microsoft HEIF Image Extensions 1.2.22.0 has an out-of-bounds read because CHEIFItemInfoEntry_GetDataSize can return success while leaving the reported data size as 0. This causes a caller to make a 1-byte allocation. Later, CopyPixels computes copy_size = stride * abs(roi_height) but does not check the source buffer length before a memmove call.","status":"published","published":"2026-06-19T14:16:21.57Z","modified":"2026-10-12T22:10:00.247Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:12:02.535029Z"}]}}