DEBIAN-CVE-2026-84383
libheif is a HEIF and AVIF file format decoder and encoder. From 1.22.0 until 1.23.2, a crafted HEIF, HEIC, or AVIF item graph using nested iden and auxl references can make HeifPixelImage::transfer_channel_from_image_as() append duplicate Alpha planes with different bit depths to m_storage. HeifPixelImage::scale_nearest_neighbor() in libheif/image/pixelimage.cc allocates the destination Alpha plane using the first plane's 8-bit depth, then iterates a later 10-bit or 12-bit Alpha component and writes uint16_t samples into the same 8-bit allocation. The output geometry controls the overflow extent and the encoded sample values control the data written, allowing a remote file processed by heif_decode_image() to cause a heap out-of-bounds write. This issue is fixed in version 1.23.2.
DEBIAN-CVE-2026-84383
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:DEBIAN-CVE-2026-84383
libheif
Source reference: /affected/0/package/name
- Affected versions
- 1.19.8-1
Source reference:
/affected/0/versions1.20.1-1Source reference:
/affected/0/versions1.20.2-1Source reference:
/affected/0/versions1.20.2-2Source reference:
/affected/0/versions1.21.2-1Source reference:
/affected/0/versions1.21.2-2Source reference:
/affected/0/versions1.21.2-3Source reference:
/affected/0/versions1.21.2-4Source reference:
/affected/0/versions1.23.1-1Source reference:
/affected/0/versions - Fixed versions
- 1.23.2-1
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.23.2-1"
}
]
}
],
"package": {
"name": "libheif",
"purl": "pkg:deb/debian/libheif?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"1.19.8-1",
"1.20.1-1",
"1.20.2-1",
"1.20.2-2",
"1.21.2-1",
"1.21.2-2",
"1.21.2-3",
"1.21.2-4",
"1.23.1-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-84383.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #58484 · Revision 1
- Added to Heist Feed
- Publisher date