CVE-2026-34378— OpenEXR has a signed integer overflow in generic_unpack() when parsing EXR files with crafted negative dataWindow.min.x
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-34378
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
OpenEXR has a signed integer overflow in generic_unpack() when parsing EXR files with crafted negative dataWindow.min.x
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
整数溢出或超界折返
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenEXR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenEXR是Academy Software Foundation开源的一种高动态范围图像（HDR）文件格式的开放标准。 OpenEXR 3.4.0至3.4.9之前版本存在安全漏洞，该漏洞源于缺少对dataWindow属性的边界检查，可能导致整数溢出和进程终止。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| AcademySoftwareFoundation | openexr | >= 3.4.0, < 3.4.9 | - |
II. Public POCs for CVE-2026-34378
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-34378
请登录查看更多情报信息。
- Release v3.4.9 · AcademySoftwareFoundation/openexr · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-34378
Same Patch Batch · AcademySoftwareFoundation · 2026-04-06 · 5 CVEs total
| CVE-2026-34379 | 7.1 HIGH | OpenEXR has a misaligned write in LossyDctDecoder_execute leading to undefined behavior (D |
| CVE-2026-34380 | 5.9 MEDIUM | OpenEXR has a signed integer overflow (undefined behavior) in undo_pxr24_impl may allow bo |
| CVE-2026-34589 | OpenEXR: DWA Lossy Decoder Heap Out-of-Bounds Write | |
| CVE-2026-34588 | OpenEXR has a signed 32-bit Overflow in PIZ Decoder Leads to OOB Read/Write |
IV. Related Vulnerabilities
Same product: openexr
- CVE-2026-42217
OpenEXR: Shift exponent overflow in `readVariableLengthInteg - CVE-2026-42216
OpenEXR: Out-of-bounds read in `IDManifest::init()` during p - CVE-2026-41142
OpenEXR is Vulnerable to Integer overflow in ImageChannel::r - CVE-2026-40250
OpenEXR has integer overflow in DWA decoder outBufferEnd poi - CVE-2026-40244
OpenEXR has integer overflow in DWA setupChannelData planarU
Same vendor: AcademySoftwareFoundation
- CVE-2026-42217
OpenEXR: Shift exponent overflow in `readVariableLengthInteg - CVE-2026-42216
OpenEXR: Out-of-bounds read in `IDManifest::init()` during p - CVE-2026-41142
OpenEXR is Vulnerable to Integer overflow in ImageChannel::r - CVE-2026-7582
AcademySoftwareFoundation OpenImageIO DDS Image ddsinput.cpp - CVE-2026-40250
OpenEXR has integer overflow in DWA decoder outBufferEnd poi
Same weakness: CWE-190
- CVE-2026-7568
Signed integer overflow in metaphone() - CVE-2026-42311
Pillow: OOB Write with Invalid PSD Tile Extents (Integer Ove - CVE-2026-42308
Pillow: Integer overflow when processing fonts - CVE-2026-6664
PgBouncer integer overflow in PgBouncer network packet parsi - CVE-2026-42199
Grid: Integer Overflow in Grid::expand_rows Leads to Safe-AP
V. Comments for CVE-2026-34378
No comments yet