CVE-2026-84449
lowlibheif is a HEIF and AVIF file format decoder and encoder.
libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.19.6, Op_RGB24_32_to_YCbCr::convert_colorspace() stores image-plane strides in an integer width that can overflow for extremely large RGB images created through heif_image_create() and heif_image_add_plane(). The resulting wrapped stride causes the conversion loop in libheif/color-conversion/rgb2yuv.cc to compute an invalid input pointer and read beyond the allocated interleaved plane while heif_context_encode_image() performs RGB-to-YCbCr conversion. This can crash the encoding process. This issue is fixed in version 1.19.6.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b22fbe3 security-advisories@github.com
- https://github.com/strukturag/libheif/releases/tag/v1.19.6 security-advisories@github.com
- https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq security-advisories@github.com
- https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq 134c704f-9b21-4f2e-91b3-4a467353bcc0