CVE catalog

CVE-2026-34378

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published: Apr 6, 2026, 3:19:34 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.26% · Oct 25, 2026

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.4.0 to before 3.4.9, a missing bounds check on the dataWindow attribute in EXR file headers allows an attacker to trigger a signed integer overflow in generic_unpack(). By setting dataWindow.min.x to a large negative value, OpenEXRCore computes an enormous image width, which is later used in a signed integer multiplication that overflows, causing the process to terminate with SIGILL via UBSan. This vulnerability is fixed in 3.4.9.

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	openexr	sid	`3.4.16+ds-1`	fixed
Debian	openexr	forky	`3.4.16+ds-1`	fixed
Debian	openexr	trixie	`3.1.13-2`	not affected
Debian	openexr	bookworm	`3.1.5-5`	not affected
Cpe	openexr	Not reported	`3.4.9`	fixed
Opensuse	openexr	tumbleweed	`3.4.9-1.1`	fixed
Cpe	openexr	Not reported	`3.4.9`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	openexr	source	sid	`3.4.14-0.1`	not yet assigned	Not reported	[1133188]
Debian	openexr	source	forky	`3.4.14-0.1`	not yet assigned	Not reported	[1133188]
Debian	openexr	source	trixie	`Not affected`	unimportant	Not reported	[1133188]
Debian	openexr	source	bookworm	`Not affected`	unimportant	Not reported	[1133188]
Cpe	openexr	cpe	Not reported	`3.4.9`	Not reported	Not reported	Not reported
Opensuse	openexr	rpm	tumbleweed	`3.4.9-1.1`	Not reported	OPENSUSE-SU-2026:10505-1	Not reported
Cpe	openexr	cpe	Not reported	`3.4.9`	Not reported	NVD-CVE-2026-34378	Not reported

[Debian bug #1133188]

OpenFactory catalog packages

[openSUSE Tumbleweed]

[libIex-3_4-33]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libIex-3_4-33-32bit]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libIex-3_4-33-x86-64-v3]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libIlmThread-3_4-33]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libIlmThread-3_4-33-32bit]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libIlmThread-3_4-33-x86-64-v3]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXR-3_4-33]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXR-3_4-33-32bit]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXR-3_4-33-x86-64-v3]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRCore-3_4-33]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRCore-3_4-33-32bit]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRCore-3_4-33-x86-64-v3]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRUtil-3_4-33]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRUtil-3_4-33-32bit]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[libOpenEXRUtil-3_4-33-x86-64-v3]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[openexr-devel]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · x86_64 · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[openexr-doc]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · noarch · tumbleweed
  Unknown · Fixed: 3.4.9-1.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed

[Debian 12 (Bookworm)]

[libopenexr-3-1-30]Not affected
Source package: [openexr]
Details (2)
- 3.1.5-5 · amd64 · bookworm
  Not affected
  nvd · openexr · debian · bookworm
- 3.1.5-5 · arm64 · bookworm
  Not affected
  nvd · openexr · debian · bookworm
[libopenexr-dev]Not affected
Source package: [openexr]
Details (2)
- 3.1.5-5 · amd64 · bookworm
  Not affected
  nvd · openexr · debian · bookworm
- 3.1.5-5 · arm64 · bookworm
  Not affected
  nvd · openexr · debian · bookworm
[libopenexr-doc]Not affected
Source package: [openexr]
Details (2)
- 3.1.5-5 · all · bookworm
  Not affected
  nvd · openexr · debian · bookworm
- 3.1.5-5 · all · bookworm
  Not affected
  nvd · openexr · debian · bookworm

Next results

Observed: Oct 26, 2026, 9:21:11 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]