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Fencer Vulns
low 3.7

CVE-2026-84449 json

libheif hOp_RGB24_32_to_YCbCr Memory Access Error / SEGV

published 2026-09-18 52 d ago modified 2026-09-22 48 d ago also EUVD-2026-83025

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

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.

Patch / fix

  • struktur libheif 1.19.6
  • libheif Debian 14, Debian 13 1.19.7-1

debian advisories DEBIAN-CVE-2026-84449

  • libheif Ubuntu 24.04 LTS 1.17.6-1ubuntu4.9
  • libheif Ubuntu Pro 18.04 LTS 1.1.0-2ubuntu0.1~esm5
  • libheif Ubuntu Pro 20.04 LTS 1.6.1-1ubuntu0.1~esm5
  • libheif Ubuntu Pro 22.04 LTS 1.12.0-2ubuntu0.1~esm5

ubuntu advisories UBUNTU-CVE-2026-84449

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • libheif SLES for SAP applications 16.0, SLES 16.0 1.23.5-160000.1.1

suse advisories SUSE-SU-2026:24205-1

  • libheif openSUSE Leap 16.0 1.23.5-160000.1.1
  • libheif openSUSE Tumbleweed 1.23.5-2.1

opensuse advisories openSUSE-SU-2026:22052-1openSUSE-SU-2026:11921-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-84449 updated cvss 3.7

libheif: libheif: Denial of Service via integer overflow in image processing

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
48 d ago

Exploit prediction

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/strukturag/libheif/security/advisories/GHSA-2c3g-p585-8rpq referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

  • strukturag libheif

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.