libheif hOp_RGB24_32_to_YCbCr Memory Access Error / SEGV

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-84449
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 16:17:12 UTC
Updated2026-09-22 15:17:19 UTC
Descriptionlibheif 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.

Risk And Classification

Primary CVSS: v3.1 3.7 LOW from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS: 0.003390000 probability, percentile 0.274070000 (date 2026-09-22)

Problem Types: CWE-125 | CWE-190 | CWE-190 CWE-190: Integer Overflow or Wraparound | CWE-125 CWE-125: Out-of-bounds Read

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
3.1CNADECLARED3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Strukturag Libheif affected < 1.19.6 Not specified

References

ReferenceSourceLinkTags
github.com/strukturag/libheif/releases/tag/v1.19.6 [email protected] github.com
github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/strukturag/libheif/commit/e29953da30eb11aa1762df0bff3b36be4b2... [email protected] github.com
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