<div class="container">
<h1>Security update for libheif</h1>
<table class="table table-striped table-bordered">
<tbody>
<tr>
<th>Announcement ID:</th>
<td>SUSE-SU-2026:4378-1</td>
</tr>
<tr>
<th>Release Date:</th>
<td>2026-09-28T15:17:28Z</td>
</tr>
<tr>
<th>Rating:</th>
<td>important</td>
</tr>
<tr>
<th>References:</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281948">bsc#1281948</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281949">bsc#1281949</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281950">bsc#1281950</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281951">bsc#1281951</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281952">bsc#1281952</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281953">bsc#1281953</a>
</li>
<li style="display: inline;">
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281954">bsc#1281954</a>
</li>
</ul>
</td>
</tr>
<tr>
<th>
Cross-References:
</th>
<td>
<ul>
<li style="display: inline;">
<a href="https://www.suse.com/security/cve/CVE-2020-6851.html">CVE-2020-6851</a>
</li>
</ul>
</td>
</tr>
<tr>
<th>CVSS scores:</th>
<td>
<ul class="list-group">
<li class="list-group-item">
<span class="cvss-reference">CVE-2020-6851</span>
<span class="cvss-source">
(
SUSE
):
</span>
<span class="cvss-score">7.8</span>
<span class="cvss-vector">CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H</span>
</li>
<li class="list-group-item">
<span class="cvss-reference">CVE-2020-6851</span>
<span class="cvss-source">
(
NVD
):
</span>
<span class="cvss-score">7.5</span>
<span class="cvss-vector">CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H</span>
</li>
</ul>
</td>
</tr>
<tr>
<th>Affected Products:</th>
<td>
<ul class="list-group">
<li class="list-group-item">Desktop Applications Module 15-SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Desktop 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Real Time 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server 15 SP7</li>
<li class="list-group-item">SUSE Linux Enterprise Server for SAP Applications 15 SP7</li>
<li class="list-group-item">SUSE Package Hub 15 15-SP7</li>
</ul>
</td>
</tr>
</tbody>
</table>
<p>An update that solves one vulnerability and has six security fixes can now be installed.</p>
<h2>Description:</h2>
<p>This update for libheif fixes the following issues:</p>
<ul>
<li>AV1/libaom path allows allocation before libheif rejects mismatched coded dimensions (bsc#1281953).</li>
<li>Caller-configured security limits not enforced for MINI-box parsing (bsc#1281952).</li>
<li>Heap out-of-bounds read in libheif alpha compositing via mismatched per-channel bit depths (bsc#1281951).</li>
<li>Heap-use-after-free and double free in ImageItem::encode_to_bitstream_and_boxes (bsc#1281949).</li>
<li>Incomplete OpenJPEG pre-decode security limits allow unsafe decode through the public API (bsc#1281954).</li>
<li>JPEG 2000 pclr zero-column allocation amplification bypasses max_total_memory (bsc#1281950).</li>
<li>Out-of-bounds heap read in unc_encoder_rgb_pixel_interleave (bsc#1281948).</li>
</ul>
<p>Changes for libheif:</p>
<p>Update to 1.23.5:
* (GHSA-v8qw-hwjv-44hw) Memory exhaustion
through a mismatch between the container and the bitstream
image size. A crafted image can declare a small size in its
ispe property while the bitstream declares a much larger
coded frame. The container-level checks used the ispe size,
so the oversized bitstream reached the decoder, which
allocated a frame buffer for the in-band size before libheif
rejected the mismatch. The advisory demonstrated this for AV1
with the libaom backend (a 351-byte AVIF declaring 64x64 but
coding up to 27648x27648, allocating hundreds of MB to more
than 10 GB), but the same class affects every codec whose
real frame size lives in the bitstream. The coded size is now
checked against max_image_size_pixels in the codec-
independent decode path, before any bytes reach a decoder
plugin: all AV1 sequence headers, all HEVC/AVC/VVC SPS NAL
units (including those carried in the item data, not only the
ones in the configuration record), the JPEG SOF marker and
the JPEG 2000 SIZ reference grid are scanned for the largest
coded size. (high)
* (GHSA-qwpf-5wf7-r996) Heap use-after-free and
double free when encoding an image that carries a TAI
timestamp, including transcoding a file with an itai
property. ImageDescription shallow-copied its raw
heif_tai_timestamp_packet pointer, and a temporary in
ImageItem::encode_to_bitstream_and_boxes() freed the packet
while the item and the source image still held it. The
timestamp is now stored by value. (medium)
* (GHSA-9c75-9g8r-4728) Memory amplification
through a JPEG 2000 pclr box declaring zero palette columns.
The entry-count bound was skipped for zero columns, so an
11-byte box allocated 65,535 empty palette entries, and
nested j2kH containers could repeat this within the child and
nesting limits: a 3 KB file reached about 330 MB RSS, none of
it charged to max_total_memory. Zero columns are rejected
(ISO/IEC 15444-1 requires 1 to 255), the byte bound is
unconditional, and the palette storage is charged to the
memory limits. (medium)
* (GHSA-r7gr-2xm2-23wf) Heap out-of-bounds read
in alpha compositing for uncompressed (unci) images whose
colour planes have different bit depths.
Op_flatten_alpha_plane read every plane through the sample
type of the first colour plane, so an 8-bit blue plane next
to 16-bit red and green planes was read with a halved stride
past its end, and the bytes ended up in the composited
output. ColorState now tracks one bit depth per plane, and
the operator declines mixed sample widths at planning time.
(medium)
* (GHSA-q492-cfcm-895h) The OpenJPEG decoder
plugin's pre-decode size check bounded the JPEG 2000 window
span (x1-x0)*(y1-y0) but not the absolute reference-grid
coordinates, so a codestream with a 17-pixel window on a grid
near the 32-bit boundary reached opj_decode(). Against
OpenJPEG 2.3.1 this produced a heap-buffer-overflow write
inside OpenJPEG (the class of CVE-2020-6851); OpenJPEG 2.5.4
rejects the input. The reference-grid area is now bounded as
well. (low)
* (GHSA-qfj5-c4pq-q998) Heap out-of-bounds read in the
uncompressed encoder when an application attached a separate
alpha plane to an image with an interleaved chroma format.
The interleaved encoders took their component list from the
chroma format (three entries) but decided whether to write
alpha from the presence of an alpha plane, and indexed the
list at [3]. heif_image_add_plane() now rejects a separate
alpha plane on interleaved images, and the encoders derive
both decisions from the chroma format. Only reachable through
the public API; decoding never produces such an image. (low)
* (GHSA-7pwf-qh74-p35w) The caller's heif_security_limits were
not applied when parsing a mini box (the MIAF minimized image
format) or the av1C/hvcC blob embedded in it; the built-in
defaults were used instead. An application that tightened the
limits got no enforcement of its max_memory_block_size or
max_total_memory on such files. The allocations are bounded
by the bytes present in the box, so this could not amplify
memory use. (low)</p>
<h2>Patch Instructions:</h2>
<p>
To install this SUSE update use the SUSE recommended
installation methods like YaST online_update or "zypper patch".<br/>
Alternatively you can run the command listed for your product:
</p>
<ul class="list-group">
<li class="list-group-item">
Desktop Applications Module 15-SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Module-Desktop-Applications-15-SP7-2026-4378</code>
</li>
<li class="list-group-item">
SUSE Package Hub 15 15-SP7
<br/>
<code>zypper in -t patch SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-4378</code>
</li>
</ul>
<h2>Package List:</h2>
<ul>
<li>
Desktop Applications Module 15-SP7 (aarch64 ppc64le s390x x86_64)
<ul>
<li>libheif-aom-1.23.5-150700.3.24.1</li>
<li>libheif-debugsource-1.23.5-150700.3.24.1</li>
<li>libheif-jpeg-debuginfo-1.23.5-150700.3.24.1</li>
<li>libheif1-1.23.5-150700.3.24.1</li>
<li>libheif-jpeg-1.23.5-150700.3.24.1</li>
<li>libheif-rav1e-1.23.5-150700.3.24.1</li>
<li>libheif-rav1e-debuginfo-1.23.5-150700.3.24.1</li>
<li>libheif-dav1d-debuginfo-1.23.5-150700.3.24.1</li>
<li>libheif-aom-debuginfo-1.23.5-150700.3.24.1</li>
<li>libheif1-debuginfo-1.23.5-150700.3.24.1</li>
<li>libheif-dav1d-1.23.5-150700.3.24.1</li>
</ul>
</li>
<li>
SUSE Package Hub 15 15-SP7 (aarch64 ppc64le s390x x86_64)
<ul>
<li>libheif-debugsource-1.23.5-150700.3.24.1</li>
<li>libheif-devel-1.23.5-150700.3.24.1</li>
<li>gdk-pixbuf-loader-libheif-1.23.5-150700.3.24.1</li>
<li>libheif-ffmpeg-1.23.5-150700.3.24.1</li>
<li>libheif-ffmpeg-debuginfo-1.23.5-150700.3.24.1</li>
<li>gdk-pixbuf-loader-libheif-debuginfo-1.23.5-150700.3.24.1</li>
</ul>
</li>
</ul>
<h2>References:</h2>
<ul>
<li>
<a href="https://www.suse.com/security/cve/CVE-2020-6851.html">https://www.suse.com/security/cve/CVE-2020-6851.html</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281948">https://bugzilla.suse.com/show_bug.cgi?id=1281948</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281949">https://bugzilla.suse.com/show_bug.cgi?id=1281949</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281950">https://bugzilla.suse.com/show_bug.cgi?id=1281950</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281951">https://bugzilla.suse.com/show_bug.cgi?id=1281951</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281952">https://bugzilla.suse.com/show_bug.cgi?id=1281952</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281953">https://bugzilla.suse.com/show_bug.cgi?id=1281953</a>
</li>
<li>
<a href="https://bugzilla.suse.com/show_bug.cgi?id=1281954">https://bugzilla.suse.com/show_bug.cgi?id=1281954</a>
</li>
</ul>
</div>