CVE catalog

CVE-2026-39886

Severity: Medium · CVSS 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published: Apr 21, 2026, 1:27:01 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.30% · Oct 25, 2026

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. Versions 3.4.0 through 3.4.9 have a signed integer overflow vulnerability in OpenEXR's HTJ2K (High-Throughput JPEG 2000) decompression path. The `ht_undo_impl()` function in `src/lib/OpenEXRCore/internal_ht.cpp` accumulates a bytes-per-line value (`bpl`) using a 32-bit signed integer with no overflow guard. A crafted EXR file with 16,385 FLOAT channels at the HTJ2K maximum width of 32,767 causes `bpl` to overflow `INT_MAX`, producing undefined behavior confirmed by UBSan. On an allocator-permissive host where the required ~64 GB allocation succeeds, the wrapped negative `bpl` value would subsequently be used as a per-scanline pointer advance, which would produce a heap out-of-bounds write. On a memory-constrained host, the allocation fails before `ht_undo_impl()` is entered. This is the second distinct integer overflow in `ht_undo_impl()`. CVE-2026-34545 addressed a different overflow in the same function — the `int16_t p` pixel-loop counter at line ~302 that overflows when iterating over channels whose `width` exceeds 32,767. The CVE-2026-34545 fix did not touch the `int bpl` accumulator at line 211, which is the subject of this advisory. The `bpl` accumulator was also not addressed by any of the 8 advisories in the 2026-04-05 v3.4.9 release batch. This finding is structurally identical to CVE-2026-34588 (PIZ `wcount*nx` overflow in `internal_piz.c`) and should be remediated with the same pattern. The CVE-2026-34588 fix did not touch `internal_ht.cpp`. Version 3.4.10 contains a remediation that addresses the vulnerability in `internal_ht.cpp`.

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	`3.4.10`	fixed
Opensuse	openexr	tumbleweed	`3.4.9-4.1`	fixed
Cpe	openexr	Not reported	`3.4.10`	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	[1134642]
Debian	openexr	source	forky	`3.4.14-0.1`	not yet assigned	Not reported	[1134642]
Debian	openexr	source	trixie	`Not affected`	unimportant	Not reported	[1134642]
Debian	openexr	source	bookworm	`Not affected`	unimportant	Not reported	[1134642]
Cpe	openexr	cpe	Not reported	`3.4.10`	Not reported	Not reported	Not reported
Opensuse	openexr	rpm	tumbleweed	`3.4.9-4.1`	Not reported	OPENSUSE-SU-2026:10665-1	Not reported
Cpe	openexr	cpe	Not reported	`3.4.10`	Not reported	NVD-CVE-2026-39886	Not reported

[Debian bug #1134642]

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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  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: 3.4.9-4.1
  Version impact unknown
  nvd · openexr · opensuse · tumbleweed
[openexr-doc]Unknown
Source package: [openexr]
Details (1)
- 3.4.14-1.1 · noarch · tumbleweed
  Unknown · Fixed: 3.4.9-4.1
  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, 10:27:46 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]