# CVE-2026-47251: libheif: This update for libheif fixes the following issues  Update to 1.23.0:  - CVE-2025-68431: heap buffer over-read in `He...

CVE-2026-47251 is fixed in libheif on 1 platform, first by SUSE-SU-2026:22153-1, released June 17, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-47251
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0016
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 17, 2026

## Description

This update for libheif fixes the following issues  Update to 1.23.0:  - CVE-2025-68431: heap buffer over-read in `HeifPixelImage: overlay()` via crafted HEIF that exercises the overlay image   item (bsc#1255735). - CVE-2026-3950: manipulation of the component stsz/stts can lead to out-of-bounds read (bsc#1259544). - CVE-2026-32738: Heap OOB Read / SEGV Crash via Zero samples_per_chunk in stsc (bsc#1265874). - CVE-2026-32739: Infinite Loop DoS in stts Sample Duration Lookup (bsc#1265875). - CVE-2026-32740: Heap-Buffer-Overflow Write in Grid Tile Chroma Compositing (bsc#1265876). - CVE-2026-32741: heap buffer overflow in decode_mask_image() (bsc#1265877). - CVE-2026-32814: Uninitialized Heap Memory Information Leak via Failed Grid Tiles (bsc#1265878). - CVE-2026-32882: Heap Buffer OOB Read in overlay compositing due to wrong alpha stride (bsc#1265879). - CVE-2026-41069: Out-of-bounds vector access leading to invalid dereference (bsc#1265979). - CVE-2026-41071: Heap buffer over-read in SampleAuxInfoReader via crafted HEIF sequence file with mismatched saiz   sample count (bsc#1265980). - CVE-2026-47178: Heap Out Of Bounds Write in unci subsystem (bsc#1265981). - CVE-2026-47247: Heap Information Disclosure via Grid Image Gap + Uninitialized Pixel Plane Allocation (bsc#1265982). - CVE-2026-47251: integer overflow bypass in vvdec_push_data2 (bsc#1265983). - CVE-2026-47254: Heap Buffer Overflow in `Track: get_next_sample_raw_data()` -- OOB Chunk Vector Access (bsc#1265987). - CVE-2026-47709: NULL pointer dereference in heif_image_handle_get_image_tiling for malformed unci image missing ispe   (bsc#1265988). - CVE-2026-47714: Integer overflow in inline mask size calculation causes undersized buffer allocation (bsc#1265989). - CVE-2026-48029: heap OOB read in ImageItem_Grid: decode_grid_tile via irot-induced tile-coordinate underflow   (bsc#1265990). - CVE-2026-49271: Wrapped icef compressed-unit range check causes out-of-bounds read in uncompressed HEIF decoder   (bsc#1266282). - CVE-2026-50142: unbounded heap allocation in HEIF sequence parser (bsc#1267455). - Heap buffer overflow via uint32_t stride overflow in image plane allocation (+ 2 additional instances) (bsc#1265997). - Incorrect byte-count initialization in BitstreamRange constructor allows container-boundary check bypass   (bsc#1265995). - Integer Overflow in SampleAuxInfoReader Offset Calculation (bsc#1265992). - Out-of-bounds read and assertion-based DoS in EXIF parsing (find_exif_tag / read32) with short EXIF TIFF payload   (bsc#1265996). - Out-of-bounds write in inline mask region API when source mask exceeds declared region (bsc#1266281).  Changes for libheif:  - version update to 1.23.0:  * add API functions to read and write metadata:  ambient viewing environment  nominal diffuse white luminance  * adds a output_image_nclx_profile_passthrough option to heif_decoding_options  * CVE-2026-50142 (GHSA-jvmp-j3cw-84mh) - unbounded heap allocation in HEIF  sequence parser (stsz fixed-size mode missing bound check) - version update to 1.22.2:  * build issues with OpenJPEG plugin (#1813)  * non-plain C in header (#1812)  * CVE-2026-49271 (GHSA-r7qj-cg5r-r6vf) - Wrapped icef compressed-unit  range check causes out-of-bounds read in uncompressed HEIF decoder  * CVE TBD (GHSA-5hqq-636x-r3cr) - Out-of-bounds write in inline mask  region API when source mask exceeds declared region - update to 1.22.0:  * This is a large release with substantial new functionality,  mainly focusing on generalized image formats (e.g., multi-  spectral images) and a reworked implementation of ISO/IEC  23001-17 (lossless image codec).  * HDR up to 64 bpp  * Multi-component images with arbitrary component layouts  (multi-spectral images, arbitrary non-visual data)  * Filter-array (Bayer / mosaic) images, with debayering in  color transformation pipeline  * Metadata: chroma-sample location (cloc), sample non-  uniformity (snuc), sensor bad-pixel map (sbpm), polarization  pattern (splz)  * heif-dec can now convert to WebP (thanks to @torusrxxx).  * heif-enc can now accept input from WebP, HEIF, pure raw files  (including floating point pixel data), and CMYK JPEG  (converted to RGB).  * TIFF input can now read many TIFF formats used in geospatial  imaging, like: 16-bit, signed integers, float samples, tiled  TIFFs, GeoTIFF overview images, CMYK JPEG, YCbCr-as-JPEG.  TIFFs with image tiling and multi-resolution layers are now  reproduced as HEIFs when converted.  * PNG decoder/encoder: cICP, cLLI, and mDCV chunk support  (#1697).  * heif-dec: auto-correct option to fix known input errors (e.g.  mismatched NCLX/VUI).  * Image, Track, Sequence samples, image component GIMI content  IDs  * Embedding of Turtle (.ttl) metadata files; automatic parsing  of GIMI content IDs from Turtle  * AOM encoder plugin now auto-selects IQ tune mode  * mini-box syntax updated to the current HEIF version 4 draft  (thanks @bradh for the initial implementation)  * unif brand (globally-unique-ID) support  * OMAF (omnidirectional images): indicate ISO/IEC 23000-22  spherical/omnidirectional image projection  * alpha bit-depth tracked through the color-conversion pipeline  * CVE-2026-32738 (GHSA-7f2h-cmpf-v9ww) : Heap OOB Read / SEGV  Crash via Zero samples_per_chunk in stsc (bsc#1265874)  * CVE-2026-32739 (GHSA-j9g7-q9hv-gq8c) : Infinite Loop DoS in  stts Sample Duration Lookup (bsc#1265875)  * CVE-2026-32740 (GHSA-frfr-f3vg-2g6j) : Heap-Buffer-Overflow  Write in Grid Tile Chroma Compositing (bsc#1265876)  * CVE-2026-32741 (GHSA-j3w5-7whq-p37q) : heap buffer overflow  in decode_mask_image() (bsc#1265877)  * CVE-2026-32814 (GHSA-4m8r-34pg-rvwc) : Uninitialized Heap  Memory Information Leak via Failed Grid Tiles (bsc#1265878)  * CVE-2026-32882 (GHSA-hg7q-rjr2-8x46) : Heap Buffer OOB Read  in overlay compositing due to wrong alpha stride (bsc#1265879)  * CVE-2026-41069 (GHSA-p82x-fpmv-576r) : Out-of-bounds vector  access leading to invalid dereference (bsc#1265979)  * CVE-2026-41071 (GHSA-xj92-xjff-h8w3) : Heap buffer over-read  in SampleAuxInfoReader via crafted HEIF sequence file with  mismatched saiz sample count (bsc#1265980)  * CVE-2026-47178 (GHSA-5x55-x5pf-9c6g) : Heap Out Of Bounds  Write in unci subsystem (bsc#1265981)  * CVE-2026-47247 (GHSA-2vh6-whr3-cmq3) : Heap Information  Disclosure via Grid Image Gap + Uninitialized Pixel Plane  Allocation (bsc#1265982)  * CVE-2026-47251 (GHSA-p6q9-fhf2-vj9v) : Incomplete fix for  (bsc#1265983)  CVE-2026-3949: integer overflow bypass in vvdec_push_data2  * CVE-2026-47254 (GHSA-wqjg-4x9g-6cvg) : Heap Buffer Overflow  in `Track::get_next_sample_raw_data()` -- OOB Chunk Vector  Access (bsc#1265987)  * CVE-2026-47709 (GHSA-4h72-vqgp-9376) : NULL pointer  dereference in heif_image_handle_get_image_tiling for  malformed unci image missing ispe  (bsc#1265988)  * CVE-2026-47714 (GHSA-h4wm-6wwf-qvhx) : Integer overflow in  inline mask size calculation causes undersized buffer  allocation (bsc#1265989)  * CVE-2026-48029 (GHSA-6x5f-qchq-cxqv) : heap OOB read in  ImageItem_Grid::decode_grid_tile via irot-induced tile-  coordinate underflow (bsc#1265990)  * (GHSA-95jx-g5vf-cpp8) : Integer Overflow in  SampleAuxInfoReader Offset Calculation (bsc#1265992)  * (GHSA-p4r6-6972-g26m) : Incorrect byte-count initialization  in BitstreamRange constructor allows container-boundary check  bypass (bsc#1265995)  * (GHSA-jh2w-m72q-q595) : Out-of-bounds read and assertion-  based DoS in EXIF parsing (find_exif_tag / read32) with short  EXIF TIFF payload (bsc#1265996)  * (GHSA-9h96-c44j-jpq9) : Heap buffer overflow via uint32_t  stride overflow in image plane allocation (bsc#1265997)  * ## Build / CI  * requires C++20  * oss-fuzz integration overhauled  * fuzzers for tile API, generic API surface, and per-codec  encoders - update to 1.21.2:  * build script for JS/WASM now supports building with JPEG2000 and  'ISO23001-17 Uncompressed' support.  * image sequence SAI data now works when using the OpenH264 decoder  plugin - update to 1.21.1:  * This patch release only fixes a build error with some GCC versions  because of a missing #include. - update to 1.21.0:  * This release adds full support for reading and writing HEIF image  sequences. libheif will now encode HEIF image sequences with all  included codecs.  * Since HEIF image sequences are very similar to MP4 videos, this new  version is also capable of decoding most MP4 videos (without audio,  of course).  * heif-enc documentation for sequence encoding  * API documentation for reading and writing sequences  * Support for image sequences with alpha channels. For most codecs,  the alpha channel will be stored in a separate, auxiliary,  monochrome track. For ISO/IEC 23001-17 (uncompressed) streams, the  alpha channel is stored in the main video track.  * Support for sequence track edit lists to define the number of  sequence repetitions (without actually repeating the video data).  * New encoder plugin using x264 to write H.264-compressed video  streams and images.  * The FFmpeg decoder plugin will now decode both H.265 and H.264.  * Support for HEIF text items and language properties.  * CVEs fixed: CVE-2025-68431 - update to 1.20.2:  - When opening tiled images, do not check against maximum image  size immediately to allow for tile-based decoding of very large  images.  - Several smaller fixes in writing image sequences  - CMake option to disable building of heif-view, which pulls in  dependency on SDL  - Fixes reading/writing of GIMI content IDs  - Some build fixes - Remove conditionals for openh264, we can build against noopenh264 - update to 1.20.1:  - Fixes a bug in decoder plugin loading. - Changes from 1.20.0:  - Sequences:  - API for reading and writing image sequences. You can read and  write sequences for all codecs (not just H.265 / AV1, but  also JPEG-2000, ISO-23001-17 uncompressed, ...). Currently  only intra-coded sequences are supported.  - API for reading and writing metadata sequences. The metadata  tracks can contain any raw timed data.  - Support for SAI (sample auxiliary information). Timed samples  (from image sequences or metadata) can have auxiliary data  attached. Currently we support TAI timestamps and GIMI  content description IDs.  - Support for track references.  - The API for sequences is described here:  https://github.com/strukturag/libheif/wiki/Reading-and-Writing-Sequences  - New command line tool heif-view to show HEIF sequences  (requires libSDL).  - Other new features:  - You can specify a security limit for the maximum total memory  libheif may use for decoding. This is easier to handle than  specifying limits on the maximum image size or single memory  allocations.  - Support for TAI timestamps (in images and sequences) has been  promoted from experimental to stable.  - FFMPEG plugin now supports HDR decoding  - Header files are now split into individual headers by topic.  However, it should still be backwards compatible with heif.h  being a catch-all covering the old content. For new  functionality (sequences, TAI), you will need to include the  specific headers.  - All struct names of the API are now also typedefs. - add build requires for brotli which it looks for since 1.18 - prepare building heif-view - update to 1.19.8:  * Set essential flag for transformative properties as required by  MIAF. This fixes the display of AVIF images with transformations  encoded by libheif in Chrome, which checks whether this flag is  set. This mainly affected images encoded by ImageMagick.  * If the environment variable LIBHEIF_SECURITY_LIMITS is set to OFF,  libheif will not check any security limits. This can be used if a  user works with large images and the application software does not  allow to adjust the libheif security limits.  * Resolved processing 16-bit JPEG-2000 - update to 1.19.7:  * Fixes a build error with SVT-AV1 encoder plugin when using reduced  symbol visibility - update to 1.19.6:  * C++ and Go wrapper licenses have been changed to MIT  * supports SVT-AV1 v3.0.0 encoder  * support emscripten builds for ES6 modules - Use correct license (these were changed in 2018) - Ensure Name: is conditionalized for the multibuild flavors to not  overwrite the .src.rpm (which is a processed .spec) and to allow  OBS to properly distinguish them flavors.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libheif opensuse-leap 16.0 | 1.23.0-160000.1.1 | [OPENSUSE-SU-2026:20974-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20974-1.md) | Jun 17, 2026 |
| Linux | libheif sles 15.7 | 1.23.0-150700.3.15.1 | [SUSE-SU-2026:2622-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2622-1.md) | Jun 24, 2026 |
| Linux | libheif sles 16.0 | 1.23.0-160000.1.1 | [SUSE-SU-2026:22153-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-22153-1.md) | Jun 17, 2026 |

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