{"id":"CVE-2026-84449","state":"PUBLISHED","title":"libheif hOp_RGB24_32_to_YCbCr Memory Access Error / SEGV","description":"libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.19.6, Op_RGB24_32_to_YCbCr::convert_colorspace() stores image-plane strides in an integer width that can overflow for extremely large RGB images created through heif_image_create() and heif_image_add_plane(). The resulting wrapped stride causes the conversion loop in libheif/color-conversion/rgb2yuv.cc to compute an invalid input pointer and read beyond the allocated interleaved plane while heif_context_encode_image() performs RGB-to-YCbCr conversion. This can crash the encoding process. This issue is fixed in version 1.19.6.","publishedAt":"2026-09-18T16:03:28.532Z","updatedAt":"2026-09-22T14:52:30.772Z","severity":{"score":3.7,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["strukturag libheif"],"affected":[{"vendor":"strukturag","product":"libheif","versions":[{"version":"< 1.19.6","status":"affected"}]}],"references":["https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq","https://github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b22fbe3","https://github.com/strukturag/libheif/releases/tag/v1.19.6"],"weaknesses":["CWE-190","CWE-125"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/84xxx/CVE-2026-84449.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-84449","state":"PUBLISHED","datePublished":"2026-09-18T16:03:28.532Z","dateUpdated":"2026-09-22T14:52:30.772Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-01T20:05:09.423Z"},"containers":{"cna":{"title":"libheif hOp_RGB24_32_to_YCbCr Memory Access Error / SEGV","descriptions":[{"lang":"en","value":"libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.19.6, Op_RGB24_32_to_YCbCr::convert_colorspace() stores image-plane strides in an integer width that can overflow for extremely large RGB images created through heif_image_create() and heif_image_add_plane(). The resulting wrapped stride causes the conversion loop in libheif/color-conversion/rgb2yuv.cc to compute an invalid input pointer and read beyond the allocated interleaved plane while heif_context_encode_image() performs RGB-to-YCbCr conversion. This can crash the encoding process. This issue is fixed in version 1.19.6."}],"affected":[{"vendor":"strukturag","product":"libheif","versions":[{"version":"< 1.19.6","status":"affected"}]}],"references":[{"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq","name":"https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b22fbe3","name":"https://github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b22fbe3","tags":["x_refsource_MISC"]},{"url":"https://github.com/strukturag/libheif/releases/tag/v1.19.6","name":"https://github.com/strukturag/libheif/releases/tag/v1.19.6","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":3.7,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-190","lang":"en","description":"CWE-190: Integer Overflow or Wraparound","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125: Out-of-bounds Read","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-18T16:03:28.532Z"},"source":{"advisory":"GHSA-2c3g-p585-8rpq","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-22T14:52:03.728215Z","id":"CVE-2026-84449","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-22T14:52:30.772Z"}}]}}}