{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-32741", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-13T15:02:00.628Z", "datePublished": "2026-05-19T19:57:26.525Z", "dateUpdated": "2026-07-15T01:07:42.833Z" }, "containers": { "cna": { "title": "libheif has a heap buffer overflow in decode_mask_image()", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-122", "lang": "en", "description": "CWE-122: Heap-based Buffer Overflow", "type": "CWE" } ] } ], "metrics": [ { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H", "version": "3.1" } } ], "references": [ { "name": "https://github.com/strukturag/libheif/security/advisories/GHSA-j3w5-7whq-p37q", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-j3w5-7whq-p37q" }, { "name": "https://github.com/strukturag/libheif/releases/tag/v1.22.0", "tags": [ "x_refsource_MISC" ], "url": "https://github.com/strukturag/libheif/releases/tag/v1.22.0" } ], "affected": [ { "vendor": "strukturag", "product": "libheif", "versions": [ { "version": "< 1.22.0", "status": "affected" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-19T19:57:26.525Z" }, "descriptions": [ { "lang": "en", "value": "libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and below contain a heap buffer overflow in MaskImageCodec::decode_mask_image(). When decoding a HEIF file containing a mask image (mski), the function copies the full iloc extent data into a pixel buffer using memcpy(dst, data.data(), data.size()). The copy length data.size() is determined by the iloc extent in the file (attacker-controlled), while the destination buffer is sized based on the declared image dimensions. Because no upper-bound check exists on the data length, a crafted file whose iloc extent exceeds the pixel buffer allocation overflows the heap. The vulnerable single-memcpy branch is reached when the mskC property specifies bits_per_pixel = 8 and the ispe property declares an even width ≥ 64 (so that stride == width), with no changes to default security limits or external codec plugins required. This issue has been fixed in version 1.22.0." } ], "source": { "advisory": "GHSA-j3w5-7whq-p37q", "discovery": "UNKNOWN" } }, "adp": [ { "references": [ { "url": "https://github.com/strukturag/libheif/security/advisories/GHSA-j3w5-7whq-p37q", "tags": [ "exploit" ] } ], "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-05-20T14:37:31.409194Z", "id": "CVE-2026-32741", "options": [ { "Exploitation": "poc" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-20T15:46:03.623Z" } }, { "affected": [ { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:10" ], "defaultStatus": "unaffected", "packageName": "glycin-loaders", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat" } ], "datePublic": "2026-05-19T19:57:26.525Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in libheif, a library for decoding and encoding HEIF (High Efficiency Image File Format) and AVIF files. A remote attacker could exploit a heap buffer overflow vulnerability in the MaskImageCodec::decode_mask_image() function by providing a specially crafted HEIF file containing a mask image. This vulnerability occurs because the function copies image data into a buffer without proper size validation, allowing the attacker-controlled input to exceed the allocated memory. Successful exploitation can lead to a denial of service (DoS) and potentially other impacts due to memory corruption." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-120", "description": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-32741" }, { "name": "RHBZ#2480002", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480002" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32741.json" } ], "timeline": [ { "lang": "en", "time": "2026-05-19T21:01:40.125Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-05-19T19:57:26.525Z", "value": "Made public." } ], "title": "libheif: libheif: Heap buffer overflow vulnerability in image decoding", "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-07-15T01:07:42.833Z" } } ] } }