--- title: "CVE-2026-43907\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2026-43907?format=md keywords: index, follow --- # CVE-2026-43907 Publication date 14 May 2026 Last updated 18 June 2026 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **8.3 · High** [Score breakdown](https://ubuntu.com/security/CVE-2026-43907?format=md#impact-score) Toggle side navigation ## Description OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, a signed integer overflow in QueryRGBBufferSizeInternal() in DPXColorConverter.cpp leads to a heap-based out-of-bounds write when processing crafted DPX image files. The function computes buffer sizes using 32-bit signed integer arithmetic with negative multipliers (e.g., pixels \* -3 \* bytes for kCbYCr descriptors and pixels \* -4 \* bytes for kABGR descriptors), where a negative result is used as an in-band signal that no separate buffer is needed. When the pixel count is sufficiently large, the multiplication overflows INT\_MIN and wraps to a small positive value. The caller in dpxinput.cpp interprets this positive value as a required buffer size, allocates an undersized heap buffer via m\_decodebuf.resize(), and then writes the full image data into it via fread, resulting in a heap buffer overflow. An attacker can exploit this by crafting a DPX file that triggers the overflow, causing a denial of service (crash) or potentially arbitrary code execution through heap corruption in any application that reads pixel data using OpenImageIO. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0. [Read the notes from the security team](https://ubuntu.com/security/CVE-2026-43907?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | openimageio | 26.04 LTS resolute | Fixed 2.5.19.1+dfsg-2ubuntu0.1~esm1 Ubuntu Pro | | 25.10 questing | Ignored end of life, was needed | | 24.04 LTS noble | Fixed 2.4.17.0+dfsg-1.1ubuntu0.1~esm1 Ubuntu Pro | | 22.04 LTS jammy | Vulnerable, fix deferred | | 20.04 LTS focal | Fixed 2.1.12.0~dfsg0-1ubuntu0.1~esm1 Ubuntu Pro | | 18.04 LTS bionic | Fixed 1.7.17~dfsg0-1ubuntu2+esm1 Ubuntu Pro | | 16.04 LTS xenial | Fixed 1.6.11~dfsg0-1ubuntu1+esm2 | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) * [Patch details](https://ubuntu.com/security/CVE-2026-43907?format=md#patch-details) ### Get expanded security coverage with Ubuntu Pro Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use. [Get Ubuntu Pro](https://ubuntu.com/pro) [30-day free trial](https://ubuntu.com/pro/free-trial) ## Notes --- ### [elisehdy](https://launchpad.net/~elisehdy) openimageio in jammy is currently FTBFS due to OpenVDB/oneTBB namespace conflict; fix deferred pending resolution. ### Patch details For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) | Package | Patch details | | --- | --- | | openimageio | * Upstream: [e086aa8](https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/e086aa86bc5ac6c3a7fb0f5059db4dcde02b9572) | ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 8.3 · High * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Network | | Attack complexity | Low | | Privileges required | None | | User interaction | Required | | Scope | Unchanged | | Confidentiality impact | Low | | Integrity impact | High | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 8.3 · High | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-43907) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2026-43907) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2026-43907) * [Debian](https://security-tracker.debian.org/tracker/CVE-2026-43907) ### Related Ubuntu Security Notices (USN) + [USN-8438-1](https://usn.ubuntu.com/USN-8438-1) + OpenImageIO vulnerabilities + 16 June 2026 ### Other references * *