Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-55371— OpenEXR: OpenEXRCore exr_attr_set_bytes() accepts NULL type_hint with positive hint_length

Quick assessment

Affected
AcademySoftwareFoundation openexr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Academy Software Foundation OpenEXR是美国Academy Software Foundation基金会开源的一种高动态范围图像(HDR)文件格式的开放标准。 Academy Software Foundation OpenEXR 3.4.0版本至3.4.12版本存在安全漏洞，该漏洞源于OpenEXRCore函数exr_attr_set_bytes()存在空指针解引用，未验证嵌套的type_hint指针是否非空，可能导致拒绝服务。

CVSS 6.9 · Medium EPSS 0.17% · P5

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
AcademySoftwareFoundation openexr >= 3.4.0, < 3.4.13 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-55371

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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: OpenEXRCore exr_attr_set_bytes() accepts NULL type_hint with positive hint_length
Source: CVE Program / CVE List V5
Vulnerability Description
OpenEXR is the reference implementation and specification for the EXR high-dynamic-range image file format, widely used in the motion picture industry. Versions 3.4.0 through 3.4.12 contain a NULL pointer dereference in the OpenEXRCore function exr_attr_set_bytes(). The public setter validates the top-level exr_attr_bytes_t value pointer but does not verify that the nested type_hint pointer is non-NULL when hint_length is greater than zero. When a caller supplies a positive hint_length together with a NULL type_hint, exr_attr_bytes_create() allocates a destination type-hint buffer and then copies from the NULL source pointer, causing a deterministic crash. The flaw is reachable through the public OpenEXRCore C API and results in a denial of service. The issue is fixed in version 3.4.13.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Academy Software Foundation OpenEXR 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Academy Software Foundation OpenEXR是美国Academy Software Foundation基金会开源的一种高动态范围图像(HDR)文件格式的开放标准。 Academy Software Foundation OpenEXR 3.4.0版本至3.4.12版本存在安全漏洞，该漏洞源于OpenEXRCore函数exr_attr_set_bytes()存在空指针解引用，未验证嵌套的type_hint指针是否非空，可能导致拒绝服务。
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, < 3.4.13 -

II. Public POCs for CVE-2026-55371

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-55371

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-55371 (1)

Same Patch Batch · AcademySoftwareFoundation · 2026-08-25 · 20 CVEs total

CVE-2026-59981 7.1 HIGH OpenEXR: Heap OOB read in SampleCountChannel row when using nonzero dataWindow
CVE-2026-59184 7.1 HIGH OpenEXR: OpenEXRUtil FlatImageChannel row nonzero dataWindow heap OOB write
CVE-2026-59186 7.1 HIGH OpenEXR: Heap out-of-bounds write in TiledRgbaInputFile via integer overflow on 32-bit (IL
CVE-2026-59187 7.1 HIGH OpenEXR: exrmetrics deep pixelmode heap buffer overflow
CVE-2026-59189 7.1 HIGH OpenEXR: Out-of-bounds read in DeepImageChannel::row() for non-zero dataWindow origin
CVE-2026-59982 7.1 HIGH OpenEXR: DWAA InputFile AC buffer overflow on ILP32 platforms
CVE-2026-68515 7.1 HIGH OpenEXR: Heap out-of-bounds write in exrmultiview with subsampled channel union
CVE-2026-68513 7.1 HIGH OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collisio
CVE-2026-65979 6.7 MEDIUM OpenEXR: Out-of-bounds read in HTJ2K decoder from unvalidated chunk header length (PLEN)
CVE-2026-55373 6.2 MEDIUM OpenEXR: OpenEXRUtil SampleCountChannel endEdit() can loop forever on UINT_MAX sample coun
CVE-2026-55059 6.1 MEDIUM OpenEXR: OpenEXRUtil SampleCountChannel row setter heap has an out-of-bounds write vulnera
CVE-2026-59984 5.5 MEDIUM OpenEXR: Scratch buffer overflow decoding B44-compressed InputFile on ILP32
CVE-2026-68514 5.5 MEDIUM OpenEXR: Heap buffer overflow in PyOpenEXR from literal/prefixed RGB channel name collisio
CVE-2026-61555 5.5 MEDIUM OpenEXR: Empty multiView viewFromChannelName file crash
CVE-2026-59985 5.5 MEDIUM OpenEXR: Heap out-of-bounds read in OpenEXRCore RLE decoding on ILP32
CVE-2026-59983 5.5 MEDIUM OpenEXR: Out-of-bounds read in DeepTiledInputFile sample-count table decode on ILP32
CVE-2026-59183 5.5 MEDIUM OpenEXR: Signed Integer Overflow Leading to Out-of-Bounds Memory Access in Deep Tile Decod
CVE-2026-62986 4.3 MEDIUM OpenEXR: PyOpenEXR deep prefixed RGB stale lane disclosure
CVE-2026-54920 OpenEXR: Integer overflow and uninitialized pointer cause invalid delete in OpenEXRUtil im

IV. Related Vulnerabilities

Same product: openexr
Same vendor: AcademySoftwareFoundation
Same weakness: CWE-20

V. Comments for CVE-2026-55371

No comments yet

Leave a comment