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CVE-2026-47709— libheif has a NULL pointer dereference in heif_image_handle_get_image_tiling for malformed unci image missing ispe

Quick assessment

Affected
strukturag libheif
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

strukturag libheif是strukturag的图像编解码库。 strukturag libheif 1.22.0之前版本存在异常处理不当漏洞，该漏洞源于在公共C API 中处理格式异常的未压缩HEIF图像项目时，因项目有关联的 属性但无关联的 属性，导致触发断言或空指针读取，可能导致拒绝服务。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1200 · Hardware Additions

Affected Version Matrix 1

VendorProduct Version RangeStatus
strukturag libheif < 1.22.0 affected
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I. Basic Information for CVE-2026-47709

Vulnerability Information
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Vulnerability Title
libheif has a NULL pointer dereference in heif_image_handle_get_image_tiling for malformed unci image missing ispe
Source: CVE Program / CVE List V5
Vulnerability Description
libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API `heif_image_handle_get_image_tiling()` when a malformed uncompressed HEIF image item has an associated `uncC` property but no associated `ispe` property. In debug builds this trips the `ispe && uncC` assertion in `ImageItem_uncompressed::get_heif_image_tiling()`. In a release/NDEBUG ASan build, the same file causes a null pointer read at address `0xa8`. Version 1.22.0 fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
strukturag libheif 异常处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
strukturag libheif是strukturag的图像编解码库。 strukturag libheif 1.22.0之前版本存在异常处理不当漏洞，该漏洞源于在公共C API `heif_image_handle_get_image_tiling()`中处理格式异常的未压缩HEIF图像项目时，因项目有关联的`uncC`属性但无关联的`ispe`属性，导致触发断言或空指针读取，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
strukturag libheif < 1.22.0 -

II. Public POCs for CVE-2026-47709

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III. Intelligence Information for CVE-2026-47709

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Patches & Fixes for CVE-2026-47709 (1)

Vendor Advisories for CVE-2026-47709 (2)

Same Patch Batch · strukturag · 2026-07-21 · 8 CVEs total

CVE-2026-47247 7.5 HIGH libheif Vulnerable to Heap Information Disclosure via Grid Image Gap + Uninitialized Pixel
CVE-2026-45382 6.9 MEDIUM libde265 has a heap-buffer-overflow READ in decode_slice_unit_tiles via unvalidated PPS ti
CVE-2026-47178 6.1 MEDIUM libheif has Heap Out Of Bounds Write in unci subsystem
CVE-2026-47254 6.1 MEDIUM libheif Has Heap Buffer Overflow in `Track::get_next_sample_raw_data()` -- OOB Chunk Vecto
CVE-2026-47714 6.1 MEDIUM libheif has integer overflow in inline mask size calculation that causes undersized buffer
CVE-2026-45383 libde265 has a heap buffer overflow (OOB read) in decode_slice_unit_WPP() via out-of-bound
CVE-2026-47251 libheif has an incomplete fix for CVE-2026-3949: integer overflow bypass in vvdec_push_dat

IV. Related Vulnerabilities

Same product: libheif
Same vendor: strukturag
Same weakness: CWE-476