libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches the issue.

amazon_alas ALAS2023-2026-1919: Amazon Linux 2023 Security Advisory:ALAS2023-2026-1919

The remote Ubuntu 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8479-1 advisory.

    It was discovered that libheif incorrectly handled certain crafted HEIF files. An attacker could possibly     use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-47178)

    It was discovered that libheif incorrectly validated offsets when decoding certain crafted HEIF files. An     attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 26.04     LTS. (CVE-2026-49271)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2622-1 advisory.

    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.

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF     decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the     addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators     outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches     the issue. (CVE-2026-49271)

Note that Nessus relies on the presence of the package as reported by the vendor.

According to its self-reported version, libheif prior to 1.22.1 is affected by an out-of-bounds read vulnerability. The uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
323914	Ubuntu 25.10 / 26.04 LTS : libheif vulnerabilities (USN-8479-1)	Nessus	Ubuntu Local Security Checks	medium
323098	SUSE SLED15: gdk-pixbuf-loader-libheif / libheif-aom / libheif-dav1d / etc (SUSE-SU-2026:2622-1)	Nessus	SuSE Local Security Checks	medium
321826	Linux Distros Unpatched Vulnerability : CVE-2026-49271	Nessus	Misc.	medium
321518	Libheif < 1.22.1 OOB Read (macOS)	Nessus	MacOS X Local Security Checks	medium

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