CVE-2026-84449libheif hOp_RGB24_32_to_YCbCr Memory Access Error / SEGV
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 3.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weakness (CWE)
- CWE-190, CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 22, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
strukturag libheif strukturag:libheif (from the name) | before 1.19.6 | CNA record |
References
- https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpqx-refsource-confirm
- https://github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b22fbe3x-refsource-misc
- https://github.com/strukturag/libheif/releases/tag/v1.19.6x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.