OpenEXR CompositeDeepScanLine integer-overflow leads to heap OOB write
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In CompositeDeepScanLine::readPixels, per-pixel totals are accumulated in vector<unsigned int> total_sizes for attacker-controlled large counts across many parts, total_sizes[ptr] wraps modulo 2^32. overall_sample_count is then derived from wrapped totals and used in samples[channel].resize(overall_sample_count). Decode pointer setup/consumption proceeds with true sample counts, and write operations in core unpack (generic_unpack_deep_pointers) overrun the undersized composite sample buffer. This vulnerability is fixed in v3.2.6, v3.3.8, and v3.4.6.
- BDU:2026-12077
- GHSA-cr4v-6jm6-4963
- ALSA-2026:7682
- ALSA-2026:8863
- ALSA-2026:8888
- openSUSE-SU-2026:10303-1
- openSUSE-SU-2026:20433-1
- PYSEC-2026-2846
- RHSA-2026:12338
- RHSA-2026:12339
- RHSA-2026:12340
- RHSA-2026:12341
- RHSA-2026:7678
- RHSA-2026:7682
- RHSA-2026:8863
- RHSA-2026:8869
- RHSA-2026:8870
- RHSA-2026:8871
- RHSA-2026:8872
- RHSA-2026:8888
- Published
- Mar 3, 2026
- Updated
- Sep 9, 2026
- EPSS
- 0.2% · 10th percentile
- CWE
- CWE-787
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Report tools
Action score
33
Monitor
Low priority for now.
- CVSS
- 33 / 40 · 8.4 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · GitHub_M
- 8.4
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| openexr | openexr | cpe:2.3:a:openexr:openexr |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- openexr openexrbefore 3.2.6
- openexr openexr3.3.0 and later · before 3.3.8
- openexr openexr3.4.0 and later · before 3.4.6
Versions reported by the vendor
Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.
AcademySoftwareFoundation openexr
- >= 2.3.0, < 3.2.6, >= 3.3.0, < 3.3.8, >= 3.4.0, < 3.4.6affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | openexr | before 3.1.10-8.el10_1.1 | 3.1.10-8.el10_1.1 |
| AlmaLinux:10 | openexr-devel | before 3.1.10-8.el10_1.1 | 3.1.10-8.el10_1.1 |
| AlmaLinux:10 | openexr-libs | before 3.1.10-8.el10_1.1 | 3.1.10-8.el10_1.1 |
| AlmaLinux:8 | OpenEXR-devel | before 2.2.0-12.el8_10.1 | 2.2.0-12.el8_10.1 |
| AlmaLinux:8 | OpenEXR-libs | before 2.2.0-12.el8_10.1 | 2.2.0-12.el8_10.1 |
| AlmaLinux:9 | openexr | before 3.1.1-3.el9_7.1 | 3.1.1-3.el9_7.1 |
| AlmaLinux:9 | openexr-devel | before 3.1.1-3.el9_7.1 | 3.1.1-3.el9_7.1 |
| AlmaLinux:9 | openexr-libs | before 3.1.1-3.el9_7.1 | 3.1.1-3.el9_7.1 |
| Debian:12 | openexr | all versions | — |
| Debian:14 | openexr | before 3.4.6+ds-1 | 3.4.6+ds-1 |
| openSUSE:Leap 16.0 | openexr | before 3.2.2-160000.5.1 | 3.2.2-160000.5.1 |
| openSUSE:Tumbleweed | openexr | before 3.4.6-1.1 | 3.4.6-1.1 |
| PyPI | openexr | from 2.3.0 · before 3.2.6 | 3.2.6 |
| PyPI | openexr | from 3.3.0 · before 3.3.8 | 3.3.8 |
| PyPI | openexr | from 3.4.0 · before 3.4.6 | 3.4.6 |
| Red Hat:enterprise_linux_eus:10.0 | openexr | before 0:3.1.10-8.el10_0.1 | 0:3.1.10-8.el10_0.1 |
| Red Hat:enterprise_linux_eus:10.0 | openexr-libs | before 0:3.1.10-8.el10_0.1 | 0:3.1.10-8.el10_0.1 |
| Red Hat:enterprise_linux:10.1 | openexr | before 0:3.1.10-8.el10_1.1 | 0:3.1.10-8.el10_1.1 |
| Red Hat:enterprise_linux:10.1 | openexr-debuginfo | before 0:3.1.10-8.el10_1.1 | 0:3.1.10-8.el10_1.1 |
| Red Hat:enterprise_linux:10.1 | openexr-debugsource | before 0:3.1.10-8.el10_1.1 | 0:3.1.10-8.el10_1.1 |
| Red Hat:enterprise_linux:10.1 | openexr-devel | before 0:3.1.10-8.el10_1.1 | 0:3.1.10-8.el10_1.1 |
| Red Hat:enterprise_linux:10.1 | openexr-libs | before 0:3.1.10-8.el10_1.1 | 0:3.1.10-8.el10_1.1 |
| Red Hat:enterprise_linux:10.1 | openexr-libs-debuginfo | before 0:3.1.10-8.el10_1.1 | 0:3.1.10-8.el10_1.1 |
| Red Hat:enterprise_linux:8::appstream | OpenEXR | before 0:2.2.0-12.el8_10.1 | 0:2.2.0-12.el8_10.1 |
+57
Same product
openexr: all recordsOther highest-scoring records for the same primary product.
- CVE-2023-5841OpenEXR Heap Overflow in Scanline Deep Data Parsing36Monitor
- CVE-2021-23169A heap-buffer overflow was found in the copyIntoFrameBuffer function of OpenEXR in versions before 3.0.1.36Monitor
- CVE-2017-9115In OpenEXR 2.2.0, an invalid write of size 2 in the = operator function in half.h could cause the application to crash or execute arbitrary 36Monitor
- CVE-2017-9113In OpenEXR 2.2.0, an invalid write of size 1 in the bufferedReadPixels function in ImfInputFile.cpp could cause the application to crash or 36Monitor
- CVE-2017-9111In OpenEXR 2.2.0, an invalid write of size 8 in the storeSSE function in ImfOptimizedPixelReading.h could cause the application to crash or 36Monitor
- CVE-2026-42216OpenEXR: Out-of-bounds read in `IDManifest::init()` during prefix expansion35Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:openexr | 3.1.10-8.el10_1.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:openexr-devel | 3.1.10-8.el10_1.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:OpenEXR-devel | 2.2.0-12.el8_10.1 · AlmaLinux:8 | Package registry (OSV) |
| almalinux:openexr-libs | 3.1.10-8.el10_1.1 · AlmaLinux:10 | Package registry (OSV) |
| almalinux:OpenEXR-libs | 2.2.0-12.el8_10.1 · AlmaLinux:8 | Package registry (OSV) |
| debian:openexr | 3.4.6+ds-1 · Debian:14 | Package registry (OSV) |
| opensuse:openexr | 3.4.6-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| PyPI:openexr | 3.2.6 | Package registry (OSV) |
| PyPI:openexr | 3.3.8 | Package registry (OSV) |
| PyPI:openexr | 3.4.6 | Package registry (OSV) |
| red hat:openexr | 0:3.1.10-8.el10_0.1 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:OpenEXR | 0:2.2.0-12.el8_8.1 · Red Hat:rhel_e4s:8.8::appstream | Package registry (OSV) |
| red hat:openexr-debuginfo | 0:3.1.10-8.el10_1.1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:OpenEXR-debuginfo | 0:2.2.0-12.el8_8.1 · Red Hat:rhel_e4s:8.8::appstream | Package registry (OSV) |
| red hat:openexr-debugsource | 0:3.1.10-8.el10_1.1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:OpenEXR-debugsource | 0:2.2.0-12.el8_8.1 · Red Hat:rhel_e4s:8.8::appstream | Package registry (OSV) |
| red hat:openexr-devel | 0:3.1.10-8.el10_1.1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:OpenEXR-devel | 0:2.2.0-12.el8_10.1 · Red Hat:enterprise_linux:8::crb | Package registry (OSV) |
| red hat:openexr-libs | 0:3.1.10-8.el10_0.1 · Red Hat:enterprise_linux_eus:10.0 | Package registry (OSV) |
| red hat:OpenEXR-libs | 0:2.2.0-12.el8_8.1 · Red Hat:rhel_e4s:8.8::appstream | Package registry (OSV) |
| red hat:openexr-libs-debuginfo | 0:3.1.10-8.el10_1.1 · Red Hat:enterprise_linux:10.1 | Package registry (OSV) |
| red hat:OpenEXR-libs-debuginfo | 0:2.2.0-12.el8_8.1 · Red Hat:rhel_e4s:8.8::appstream | Package registry (OSV) |
| rocky linux:openexr | 0:3.1.10-8.el10_1.1 · Rocky Linux:10 | Package registry (OSV) |
| rocky linux:OpenEXR | 0:2.2.0-12.el8_10.1 · Rocky Linux:8 | Package registry (OSV) |
| suse:openexr | 3.2.2-160000.5.1 · SUSE:Linux Enterprise Server 16.0 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- No account or password is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- Integrity
- Availability
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- A
- Scope
- X
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/errata/RHSA-2026:12338
- access.redhat.com/errata/RHSA-2026:12339
- access.redhat.com/errata/RHSA-2026:12340
- access.redhat.com/errata/RHSA-2026:12341
- access.redhat.com/errata/RHSA-2026:16008
- access.redhat.com/errata/RHSA-2026:16009
- access.redhat.com/errata/RHSA-2026:16030
- access.redhat.com/errata/RHSA-2026:16174
- access.redhat.com/errata/RHSA-2026:7678
- access.redhat.com/errata/RHSA-2026:7682
- access.redhat.com/errata/RHSA-2026:8863
- access.redhat.com/errata/RHSA-2026:8869
- access.redhat.com/errata/RHSA-2026:8870
- access.redhat.com/errata/RHSA-2026:8871
- access.redhat.com/errata/RHSA-2026:8872
- access.redhat.com/errata/RHSA-2026:8888
- access.redhat.com/security/cve/CVE-2026-27622
- bugzilla.redhat.com/show_bug.cgi?id=2444251
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27622.json
Vendor advisories and official records. Exploit/PoC links are deliberately left out.