libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.0 and earlier, a crafted image sequence with a 2x2 primary plane and a 256x256 auxiliary alpha plane can cause attacker-controlled heap corruption during a normal decode and re-encode workflow. Track_Visual::decode_next_image_sample() calls transfer_channel_from_image_as() without checking that the auxiliary alpha dimensions match the main frame. The resulting inconsistent image reaches heif_track_decode_next_image() and then heif_context_encode_image(). In unc_encoder::encode(), unc_encoder_component_interleave::encode_tile() sizes its buffer with compute_tile_data_size_bytes() using the primary dimensions but copies each component using its actual plane dimensions. The oversized alpha plane is therefore copied beyond the allocation, causing an out-of-bounds write; the inverse size mismatch can also produce an out-of-bounds read. This issue is fixed in version 1.23.1.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21644-1 advisory.

    Update to version 1.23.1 (jsc#PED-16355).

    Security issues fixed:

    - CVE-2026-62289: integer underflow in Fraction constructor via double clap transform application     (bsc#1273079).
    - CVE-2026-62291: heap out-of-bounds write in the uncompressed encoder when writing images with mismatched     auxiliary       alpha dimensions (bsc#1273080).
    - CVE-2026-62292: out-of-bounds read in uncompressed unci tile range slicing (bsc#1273081).
    - CVE-2026-62377: reachable assertion in `HeifContext::get_track()` aborts on a valid-but-empty HEIF     sequence file       (bsc#1273082).
    - Heap out-of-bounds write in the uncompressed encoder for RRGGBB images with interleaved bit-depth `<= 8`       (bsc#1273083).

    Changes for libheif:

    - Version 1.23.1
      - FFmpeg decoder plugin gains AV1, VVC, JPEG, and JPEG 2000/HTJ2K decoding.
      - SVT-AV1 encoder: new `tune=iq` and `ms-ssim` tune parameters.
      - C++ API: added getters/setters for the CLLI and MDCV HDR metadata boxes.
      - Sequence decoder now scales the alpha auxiliary track to the main image size.
      - Fixed pixi box writing for multi-channel images.
      - Corrected the placement of the TAI `clock_type` field into the top 2 bits.
      - Empty/unset plugin directory is no longer scanned.

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. In 1.23.0 and earlier, a crafted image     sequence with a 2x2 primary plane and a 256x256 auxiliary alpha plane can cause attacker-controlled heap     corruption during a normal decode and re-encode workflow. Track_Visual::decode_next_image_sample() calls     transfer_channel_from_image_as() without checking that the auxiliary alpha dimensions match the main     frame. The resulting inconsistent image reaches heif_track_decode_next_image() and then     heif_context_encode_image(). In unc_encoder::encode(), unc_encoder_component_interleave::encode_tile()     sizes its buffer with compute_tile_data_size_bytes() using the primary dimensions but copies each     component using its actual plane dimensions. The oversized alpha plane is therefore copied beyond the     allocation, causing an out-of-bounds write; the inverse size mismatch can also produce an out-of-bounds     read. This issue is fixed in version 1.23.1. (CVE-2026-62291)

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

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-2026:3597-1 advisory.

    Update to version 1.23.1 (jsc#PED-16355).

    Security issues fixed:

    - CVE-2026-62289: integer underflow in Fraction constructor via double clap transform application     (bsc#1273079).
    - CVE-2026-62291: heap out-of-bounds write in the uncompressed encoder when writing images with mismatched     auxiliary       alpha dimensions (bsc#1273080).
    - CVE-2026-62292: out-of-bounds read in uncompressed unci tile range slicing (bsc#1273081).
    - CVE-2026-62377: reachable assertion in `HeifContext::get_track()` aborts on a valid-but-empty HEIF     sequence file       (bsc#1273082).
    - Heap out-of-bounds write in the uncompressed encoder for RRGGBB images with interleaved bit-depth `<= 8`       (bsc#1273083).

    Changes for libheif:

    - Version 1.23.1
      - FFmpeg decoder plugin gains AV1, VVC, JPEG, and JPEG 2000/HTJ2K decoding.
      - SVT-AV1 encoder: new `tune=iq` and `ms-ssim` tune parameters.
      - C++ API: added getters/setters for the CLLI and MDCV HDR metadata boxes.
      - Sequence decoder now scales the alpha auxiliary track to the main image size.
      - Fixed pixi box writing for multi-channel images.
      - Corrected the placement of the TAI `clock_type` field into the top 2 bits.
      - Empty/unset plugin directory is no longer scanned.

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.

ID	Name	Product	Family	Type	Severity
341176	openSUSE 16: gdk-pixbuf-loader-libheif / libheif-aom / libheif-dav1d / etc (openSUSE-SU-2026:21644-1)	Nessus	SuSE Local Security Checks	Local	high
338264	Linux Distros Unpatched Vulnerability : CVE-2026-62291	Nessus	Misc.	Local	medium
335100	SUSE SLED15: gdk-pixbuf-loader-libheif / libheif-aom / libheif-dav1d / etc (SUSE-SU-2026:3597-1)	Nessus	SuSE Local Security Checks	Local	high

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CVE-2026-62291

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