CVE-2026-55373
MediumCVSS 6.2Exploitation Probability (EPSS)
Low risk1th percentile - higher than 1% of all known CVEs
Summary
OpenEXR before versions 3.2.10, 3.3.12, and 3.4.13 has an infinite-loop vulnerability in roundListSizeUp() in SampleCountChannel. Supplying UINT_MAX causes the loop to never exit, leading to application hang (denial of service).
Risk Assessment
An attacker can exploit this to hang applications processing EXR files, potentially causing service unavailability.
Recommendation
Update OpenEXR to versions 3.2.10, 3.3.12, or 3.4.13 which contain the fix. Avoid processing untrusted EXR files.
Other vulnerabilities in OpenEXR
See all- CVE-2017-12596High
In OpenEXR 2.2.0, a crafted image causes a heap-based buffer over-read in the hufDecode function in IlmImf/ImfHuf.cpp during exrmaketiled execution; it may result in denial of service or possibly unspecified other impact.
- CVE-2017-9115High
In 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 code.
- CVE-2017-9113High
In OpenEXR 2.2.0, an invalid write of size 1 in the bufferedReadPixels function in ImfInputFile.cpp could cause the application to crash or execute arbitrary code.
- CVE-2017-9111High
In OpenEXR 2.2.0, an invalid write of size 8 in the storeSSE function in ImfOptimizedPixelReading.h could cause the application to crash or execute arbitrary code.
- CVE-2026-42217Critical
OpenEXR versions from 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11 have an issue with the readVariableLengthInteger() function that decodes a variable-length integer from untrusted EXR input without bounding the shift count. After enough continuation bytes, the code executes a left shift by 70 on a 64-bit value, leading to undefined behavior.
- CVE-2026-42216Critical
In OpenEXR versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, a vulnerability exists in the IDManifest::init() function. When reconstructing strings from a prefix-compressed representation, the code reads bytes without verifying that the current string has at least two bytes, potentially causing an out-of-bounds read.
- CVE-2026-68515High
OpenEXR before versions 3.2.11, 3.3.13, and 3.4.14 contains a vulnerability in the exrmultiview utility that can write past a heap allocation when combining two attacker-supplied, individually valid scanline EXR files whose union dataWindow is not aligned to one view's channel subsampling. This leads to a heap out-of-bounds write.
- CVE-2026-68514Medium
PyOpenEXR versions 3.3.0-3.3.12 and 3.4.0-3.4.13 have a heap out-of-bounds write vulnerability when reading a crafted deep scanline EXR file. A specially crafted file with a 'left' channel and layer-prefixed RGB channels can cause a buffer overflow and crash.
- CVE-2026-68513High
OpenEXR versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13 contain a heap buffer overflow in PyOpenEXR triggered by a channel-name key collision between literal and prefixed RGB channels. A crafted EXR file can cause an out-of-bounds write in a NumPy array during pixel decoding.
- CVE-2026-59981High
OpenEXR versions through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13 contain a vulnerability in the OpenEXRUtil library that returns an out-of-bounds pointer from the SampleCountChannel::row() API for deep images with a non-zero dataWindow origin. This can lead to an out-of-bounds read, potentially causing a process crash or disclosure of memory data.
Original NVD description (English source)
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. Versions prior to 3.2.10, 3.3.12, and 3.4.13 contain an infinite-loop vulnerability in SampleCountChannel. The helper roundListSizeUp() rounds a sample-list size up to the next power of two using repeated unsigned left shifts, which terminates for normal values but fails for UINT_MAX: the sequence reaches 0x80000000, and the next left shift wraps the 32-bit value to 0. Because 0 remains less than UINT_MAX, the loop never progresses and never exits. The bug is reachable through public OpenEXRUtil APIs, either by editing the sample-count buffer through SampleCountChannel::Edit (whose destructor calls endEdit()) or by calling SampleCountChannel::set(x, y, UINT_MAX) on a valid pixel. This issue has been fixed in versions 3.2.10, 3.3.12, and 3.4.13.