CVE-2026-84449: CWE-190: Integer Overflow or Wraparound in strukturag libheif
CVE-2026-84449 is an integer overflow vulnerability in the libheif library prior to version 1.19.6. The flaw occurs in the convert_colorspace() function when handling extremely large RGB images, causing an integer overflow in the image-plane stride calculation. This overflow leads to reading beyond allocated memory during RGB-to-YCbCr conversion, potentially crashing the encoding process. The issue is fixed in libheif version 1.19.6.
AI Analysis
Technical Summary
The vulnerability in libheif (CVE-2026-84449) involves an integer overflow in the Op_RGB24_32_to_YCbCr::convert_colorspace() function. When extremely large RGB images are created via heif_image_create() and heif_image_add_plane(), the stride calculation uses an integer width that can overflow. This overflow causes the conversion loop in rgb2yuv.cc to compute an invalid input pointer, resulting in out-of-bounds reads during heif_context_encode_image()'s RGB-to-YCbCr conversion. This can cause the encoding process to crash. The issue is resolved in version 1.19.6.
Potential Impact
The vulnerability can cause a denial of service by crashing the encoding process when processing specially crafted large RGB images. There is no impact on confidentiality or integrity reported. The CVSS score is 3.7 (low severity), reflecting the limited impact and the requirement for a high attack complexity.
Mitigation Recommendations
Upgrade libheif to version 1.19.6 or later, where this integer overflow issue has been fixed. No other mitigations are specified or required.
CVE-2026-84449: CWE-190: Integer Overflow or Wraparound in strukturag libheif
Description
CVE-2026-84449 is an integer overflow vulnerability in the libheif library prior to version 1.19.6. The flaw occurs in the convert_colorspace() function when handling extremely large RGB images, causing an integer overflow in the image-plane stride calculation. This overflow leads to reading beyond allocated memory during RGB-to-YCbCr conversion, potentially crashing the encoding process. The issue is fixed in libheif version 1.19.6.
CVSS v3.1
Score 3.7low
Affected software
strukturag
libheif
pkg:github/strukturag/libheifRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in libheif (CVE-2026-84449) involves an integer overflow in the Op_RGB24_32_to_YCbCr::convert_colorspace() function. When extremely large RGB images are created via heif_image_create() and heif_image_add_plane(), the stride calculation uses an integer width that can overflow. This overflow causes the conversion loop in rgb2yuv.cc to compute an invalid input pointer, resulting in out-of-bounds reads during heif_context_encode_image()'s RGB-to-YCbCr conversion. This can cause the encoding process to crash. The issue is resolved in version 1.19.6.
Potential Impact
The vulnerability can cause a denial of service by crashing the encoding process when processing specially crafted large RGB images. There is no impact on confidentiality or integrity reported. The CVSS score is 3.7 (low severity), reflecting the limited impact and the requirement for a high attack complexity.
Mitigation Recommendations
Upgrade libheif to version 1.19.6 or later, where this integer overflow issue has been fixed. No other mitigations are specified or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-09-01T20:05:09.423Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aad640a55bf5e2cf53a6a56
Added to database: 09/18/2026, 16:17:14 UTC
Last enriched: 09/18/2026, 16:32:09 UTC
Last updated: 09/18/2026, 18:42:03 UTC
Views: 6
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