Bug#1124317: libheif: CVE-2025-68431
Source: libheif
Version: 1.20.2-2
Severity: important
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@security.debian.org>
Hi,
The following vulnerability was published for libheif.
CVE-2025-68431[0]:
| libheif is an HEIF and AVIF file format decoder and encoder. Prior
| to version 1.21.0, a crafted HEIF that exercises the overlay image
| item path triggers a heap buffer over-read in
| `HeifPixelImage::overlay()`. The function computes a negative row
| length (likely from an unclipped overlay rectangle or invalid
| offsets), which then underflows when converted to `size_t` and is
| passed to `memcpy`, causing a very large read past the end of the
| source plane and a crash. Version 1.21.0 contains a patch. As a
| workaround, avoid decoding images using `iovl` overlay boxes.
If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.
For further information see:
[0] https://security-tracker.debian.org/tracker/CVE-2025-68431
https://www.cve.org/CVERecord?id=CVE-2025-68431
[1] https://github.com/strukturag/libheif/security/advisories/GHSA-j87x-4gmq-cqfq
[2] https://github.com/strukturag/libheif/commit/b8c12a7b70f46c9516711a988483bed377b78d46
Please adjust the affected versions in the BTS as needed.
Regards,
Salvatore
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