CVE catalog

CVE-2026-63638

Severity: High · CVSS 8.3CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H
Published: Aug 4, 2026, 12:00:00 AM UTC
Updated: Sep 18, 2026, 4:17:08 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.46% · Oct 25, 2026

OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, A crafted cineon image can declare unsupported component bit depth 26. cineoninput::open() maps it to a 32-bit imagespec, but libcineon maps the unsupported depth to an 8-byte value, so cineoninput::read_native_scanline() causes attacker-controlled data to be written beyond the 4-byte-per-pixel caller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/cineon.imageio/cineoninput.cpp, CineonInput::open(), CineonInput::read_native_scanline(), ComponentDataSize(), bit depth 26, and ImageSpec, which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	openimageio	sid	`3.1.18.1+dfsg-2`	fixed
Debian	openimageio	forky	`3.1.18.1+dfsg-2`	fixed
Debian	openimageio	trixie	`2.5.18.0+dfsg-1`	vulnerable
Debian	openimageio	bookworm	`2.4.7.1+dfsg-2`	vulnerable
Cpe	openimageio	Not reported	Not reported	unknown

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	openimageio	source	sid	`3.1.18.0+dfsg-2`	not yet assigned	Not reported	[1148554]
Debian	openimageio	source	forky	`3.1.18.0+dfsg-2`	not yet assigned	Not reported	[1148554]
Debian	openimageio	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1148554]
Debian	openimageio	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1148554]

[Debian bug #1148554]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libopenimageio2.4]Affected
Source package: [openimageio]
Details (2)
- 2.4.7.1+dfsg-2 · amd64 · bookworm
  Affected
  nvd · openimageio · debian · bookworm; nvd · openimageio · debian · 12
- 2.4.7.1+dfsg-2 · arm64 · bookworm
  Affected
  nvd · openimageio · debian · bookworm; nvd · openimageio · debian · 12
[libopenimageio-dev]Affected
Source package: [openimageio]
Details (2)
- 2.4.7.1+dfsg-2 · amd64 · bookworm
  Affected
  nvd · openimageio · debian · bookworm; nvd · openimageio · debian · 12
- 2.4.7.1+dfsg-2 · arm64 · bookworm
  Affected
  nvd · openimageio · debian · bookworm; nvd · openimageio · debian · 12
[libopenimageio-doc]Affected
Source package: [openimageio]
Details (2)
- 2.4.7.1+dfsg-2 · all · bookworm
  Affected
  nvd · openimageio · debian · bookworm; nvd · openimageio · debian · 12
- 2.4.7.1+dfsg-2 · all · bookworm
  Affected
  nvd · openimageio · debian · bookworm; nvd · openimageio · debian · 12
[openimageio-tools]Affected
Source package: [openimageio]
Details (2)
- 2.4.7.1+dfsg-2 · amd64 · bookworm
  Affected
  nvd · openimageio · debian · bookworm; nvd · openimageio · debian · 12
- 2.4.7.1+dfsg-2 · arm64 · bookworm
  Affected
  nvd · openimageio · debian · bookworm; nvd · openimageio · debian · 12
[python3-openimageio]Affected
Source package: [openimageio]
Details (2)
- 2.4.7.1+dfsg-2 · amd64 · bookworm
  Affected
  nvd · openimageio · debian · bookworm; nvd · openimageio · debian · 12
- 2.4.7.1+dfsg-2 · arm64 · bookworm
  Affected
  nvd · openimageio · debian · bookworm; nvd · openimageio · debian · 12

[Debian 13 (Trixie)]

[libopenimageio2.5]Affected
Source package: [openimageio]
Details (2)
- 2.5.18.0+dfsg-1+b1 · amd64 · trixie
  Affected
  nvd · openimageio · debian · 13
- 2.5.18.0+dfsg-1+b1 · arm64 · trixie
  Affected
  nvd · openimageio · debian · 13
[libopenimageio-dev]Affected
Source package: [openimageio]
Details (2)
- 2.5.18.0+dfsg-1+b1 · amd64 · trixie
  Affected
  nvd · openimageio · debian · 13
- 2.5.18.0+dfsg-1+b1 · arm64 · trixie
  Affected
  nvd · openimageio · debian · 13
[libopenimageio-doc]Affected
Source package: [openimageio]
Details (2)
- 2.5.18.0+dfsg-1 · all · trixie
  Affected
  nvd · openimageio · debian · 13
- 2.5.18.0+dfsg-1 · all · trixie
  Affected
  nvd · openimageio · debian · 13
[openimageio-tools]Affected
Source package: [openimageio]
Details (2)
- 2.5.18.0+dfsg-1+b1 · amd64 · trixie
  Affected
  nvd · openimageio · debian · 13
- 2.5.18.0+dfsg-1+b1 · arm64 · trixie
  Affected
  nvd · openimageio · debian · 13
[python3-openimageio]Affected
Source package: [openimageio]
Details (2)
- 2.5.18.0+dfsg-1+b1 · amd64 · trixie
  Affected
  nvd · openimageio · debian · 13
- 2.5.18.0+dfsg-1+b1 · arm64 · trixie
  Affected
  nvd · openimageio · debian · 13

Observed: Oct 23, 2026, 9:42:40 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]