DEBIAN-CVE-2026-32741
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-32741
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-32741.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-32741
- Upstream
- Published
- 2026-05-19T21:16:42Z
- Modified
- 2026-09-14T17:03:29Z
- Severity
-
- 7.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H CVSS Calculator
- Summary
- [none]
- Details
-
libheif is a HEIF and AVIF file format decoder and encoder. Versions 1.21.2 and below contain a heap buffer overflow in MaskImageCodec::decode_mask_image(). When decoding a HEIF file containing a mask image (mski), the function copies the full iloc extent data into a pixel buffer using memcpy(dst, data.data(), data.size()). The copy length data.size() is determined by the iloc extent in the file (attacker-controlled), while the destination buffer is sized based on the declared image dimensions. Because no upper-bound check exists on the data length, a crafted file whose iloc extent exceeds the pixel buffer allocation overflows the heap. The vulnerable single-memcpy branch is reached when the mskC property specifies bits_per_pixel = 8 and the ispe property declares an even width ≥ 64 (so that stride == width), with no changes to default security limits or external codec plugins required. This issue has been fixed in version 1.22.0.
- References
Affected packages
Debian:12 / libheif
Package
- Name
- libheif
- Purl
- pkg:deb/debian/libheif?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
1.*
Debian:13 / libheif
Package
- Name
- libheif
- Purl
- pkg:deb/debian/libheif?arch=source&distro=trixie
Debian:14 / libheif
Package
- Name
- libheif
- Purl
- pkg:deb/debian/libheif?arch=source&distro=forky