DEBIAN-CVE-2026-62291
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-62291
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-62291.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-62291
- Upstream
- Published
- 2026-08-18T22:17:02Z
- Modified
- 2026-09-10T08:47:23Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References
Affected packages
Debian:14 / libheif
Package
- Name
- libheif
- Purl
- pkg:deb/debian/libheif?arch=source&distro=forky