---
title: "CVE-2026-84444: libheif - Buffer Overflow"
description: "libheif < 1.23.2 with WITH_UNCOMPRESSED_CODEC enabled contains a heap buffer overflow caused by missing component size checks in heif_context_add_image_tile, letting attackers cause memory corruption, exploit requires crafted HEIF/AVIF files."
url: https://panop.io/threat-heartbeat/CVE-2026-84444/
---

# CVE-2026-84444 libheif - Buffer Overflow

libheif < 1.23.2 with WITH\_UNCOMPRESSED\_CODEC enabled contains a heap buffer overflow caused by missing component size checks in heif\_context\_add\_image\_tile, letting attackers cause memory corruption, exploit requires crafted HEIF/AVIF files.

CVSS base score 7.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.48% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-84444)

## Details

Type

Buffer Overflow

Impact

Remote Code Execution, Denial Of Service

CVSS vector

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

Published

18 September 2026

Updated

15 October 2026

Weakness

[CWE-787](https://cwe.mitre.org/data/definitions/787.html)

## Vendor fix

Update to version 1.23.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-84444](https://nvd.nist.gov/vuln/detail/CVE-2026-84444)
- [https://github.com/strukturag/libheif/commit/e65071f59a1ac08aa1eb0d07a831deaf6bb4d03b](https://github.com/strukturag/libheif/commit/e65071f59a1ac08aa1eb0d07a831deaf6bb4d03b)
- [https://github.com/strukturag/libheif/releases/tag/v1.23.2](https://github.com/strukturag/libheif/releases/tag/v1.23.2)
- [https://github.com/strukturag/libheif/security/advisories/GHSA-j264-xvrp-5v7q](https://github.com/strukturag/libheif/security/advisories/GHSA-j264-xvrp-5v7q)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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