CVE-2026-68516
OpenEXR: HTJ2K SIZ image-offset gap stack buffer overflow
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode. An HTJ2K-compressed EXR whose JPEG 2000 SIZ fields place the first tile outside the visible image can reach invalid tile and codeblock geometry in the vendored OpenJPH AVX2 decoder, causing a stack out-of-bounds write and denial of service. OpenEXR's HTJ2K path validates the decoded codestream dimensions against the EXR chunk size, but it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image. This issue is fixed in version 3.4.14.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
OpenEXR: HTJ2K SIZ image-offset gap stack buffer overflow
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode. An HTJ2K-compressed EXR whose JPEG 2000 SIZ fields place the first tile outside the visible image can reach invalid tile and codeblock geometry in the vendored OpenJPH AVX2 decoder, causing a stack out-of-bounds write and denial of service. OpenEXR's HTJ2K path validates the decoded codestream dimensions against the EXR chunk size, but it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image. This issue is fixed in version 3.4.14.
- Record
CVE-2026-68516- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-787, CWE-121
- Updated
- 2026-11-02
EUVDEUVD-2026-65178
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode. An HTJ2K-compressed EXR whose JPEG 2000 SIZ fields place the first tile outside the visible image can reach invalid tile and codeblock geometry in the vendored OpenJPH AVX2 decoder, causing a stack out-of-bounds write and denial of service. OpenEXR's HTJ2K path validates the decoded codestream dimensions against the EXR chunk size, but it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image. This issue is fixed in version 3.4.14.
- Record
EUVD-2026-65178- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
NVD
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode. An HTJ2K-compressed EXR whose JPEG 2000 SIZ fields place the first tile outside the visible image can reach invalid tile and codeblock geometry in the vendored OpenJPH AVX2 decoder, causing a stack out-of-bounds write and denial of service. OpenEXR's HTJ2K path validates the decoded codestream dimensions against the EXR chunk size, but it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image. This issue is fixed in version 3.4.14.
- Record
CVE-2026-68516- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-121, CWE-787
- Updated
- 2026-11-02
OSVBELL-CVE-2026-68516
- Record
BELL-CVE-2026-68516- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
OpenEXR: HTJ2K SIZ image-offset gap stack buffer overflow
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode. An HTJ2K-compressed EXR whose JPEG 2000 SIZ fields place the first tile outside the visible image can reach invalid tile and codeblock geometry in the vendored OpenJPH AVX2 decoder, causing a stack out-of-bounds write and denial of service. OpenEXR's HTJ2K path validates the decoded codestream dimensions against the EXR chunk size, but it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image. This issue is fixed in version 3.4.14.
- Record
CVE-2026-68516- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Weakness
- CWE-121, CWE-787
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-68516
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode. An HTJ2K-compressed EXR whose JPEG 2000 SIZ fields place the first tile outside the visible image can reach invalid tile and codeblock geometry in the vendored OpenJPH AVX2 decoder, causing a stack out-of-bounds write and denial of service. OpenEXR's HTJ2K path validates the decoded codestream dimensions against the EXR chunk size, but it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image. This issue is fixed in version 3.4.14.
- Record
DEBIAN-CVE-2026-68516- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-68516
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. From version 3.4.0 through 3.4.13, a crafted HTJ2K-compressed EXR can crash OpenEXR during normal decode. An HTJ2K-compressed EXR whose JPEG 2000 SIZ fields place the first tile outside the visible image can reach invalid tile and codeblock geometry in the vendored OpenJPH AVX2 decoder, causing a stack out-of-bounds write and denial of service. OpenEXR's HTJ2K path validates the decoded codestream dimensions against the EXR chunk size, but it does not reject SIZ image-offset/tile-grid geometry where the first tile does not intersect the image. This issue is fixed in version 3.4.14.
- Record
UBUNTU-CVE-2026-68516- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVopenSUSE-SU-2026:12184-1 No score
python313-OpenEXR-3.4.16-1.1 on GA media
These are all security issues fixed in the python313-OpenEXR-3.4.16-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2026:12184-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openexrAlpaquita:stream |
3.4.4-r0 up to 3.4.15-r0 | 3.4.15-r0 |
openexrDebian:12 |
All versions, plus listed versions 3.1.13-13.1.13-23.1.5-53.1.5-5.13.1.5-5.1+hurd.1 Show 6 moreShow less3.4.14-0.13.4.15+ds-13.4.6+ds-13.4.6+ds-23.4.6+ds-33.4.6+ds-4 |
None known |
openexrDebian:13 |
All versions, plus listed versions 3.1.13-23.4.14-0.13.4.15+ds-13.4.6+ds-13.4.6+ds-23.4.6+ds-33.4.6+ds-4 |
None known |
openexrDebian:14 |
before 3.4.14-0.1, plus listed versions 3.1.13-23.4.6+ds-13.4.6+ds-23.4.6+ds-33.4.6+ds-4 |
3.4.14-0.1 |
openexrUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 2.2.0-1ubuntu32.2.0-7ubuntu12.2.0-9ubuntu12.2.0-10ubuntu22.2.0-10ubuntu2.1 Show 8 moreShow less2.2.0-10ubuntu2.22.2.0-10ubuntu2.32.2.0-10ubuntu2.42.2.0-10ubuntu2.62.2.0-10ubuntu2.6+esm12.2.0-10ubuntu2.6+esm22.2.0-10ubuntu2.6+esm32.2.0-10ubuntu2.6+esm4 |
None known |
openexrUbuntu:Pro:18.04:LTS |
All versions, plus listed versions 2.2.0-11ubuntu12.2.0-11.1ubuntu12.2.0-11.1ubuntu1.12.2.0-11.1ubuntu1.22.2.0-11.1ubuntu1.3 Show 6 moreShow less2.2.0-11.1ubuntu1.42.2.0-11.1ubuntu1.62.2.0-11.1ubuntu1.72.2.0-11.1ubuntu1.82.2.0-11.1ubuntu1.92.2.0-11.1ubuntu1.9+esm1 |
None known |
openexrUbuntu:Pro:20.04:LTS |
All versions, plus listed versions 2.2.1-4.1ubuntu12.3.0-62.3.0-6build12.3.0-6ubuntu0.12.3.0-6ubuntu0.2 Show 4 moreShow less2.3.0-6ubuntu0.32.3.0-6ubuntu0.52.3.0-6ubuntu0.5+esm12.3.0-6ubuntu0.5+esm2 |
None known |
openexrUbuntu:Pro:22.04:LTS |
All versions, plus listed versions 2.5.4-22.5.7-12.5.7-1ubuntu0.1~esm12.5.7-1ubuntu0.1~esm2 |
None known |
openexrUbuntu:Pro:24.04:LTS |
All versions, plus listed versions 3.1.5-5.13.1.5-5.1build13.1.5-5.1build23.1.5-5.1build33.1.5-5.1ubuntu0.1~esm1 |
None known |
openexrUbuntu:26.10 |
All versions, plus listed versions 3.1.13-2build13.4.6+ds-4ubuntu3 |
None known |
openexrUbuntu:Pro:26.04:LTS |
All versions, plus listed versions 3.1.13-23.1.13-2build13.1.13-2ubuntu0.26.04.1~esm1 |
None known |
python-OpenEXRopenSUSE:Tumbleweed |
before 3.4.16-1.1 | 3.4.16-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-68516 is a medium vulnerability (CVSS 6.5) in Academysoftwarefoundation Openexr, published August 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. Fixed in openexr 3.4.15-r0.
References
github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-fw66-6xph-56jm
docs.bell-sw.com/security/cves/CVE-2026-68516
nvd.nist.gov/vuln/detail/CVE-2026-68516
Show 25 moreShow less
security-tracker.debian.org/tracker/CVE-2026-68516
ubuntu.com/security/CVE-2026-68516
cve.org/CVERecord?id=CVE-2026-68516
suse.com/security/cve/CVE-2026-59183