CVE-2026-55373
- Source
- https://cve.org/CVERecord?id=CVE-2026-55373
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55373.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-55373
- Aliases
-
- GHSA-mff9-68x3-h8rh
- Downstream
- Related
- Published
- 2026-08-25T00:39:45.185Z
- Modified
- 2026-08-27T11:31:12.090114779Z
- Severity
-
- 6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- OpenEXR: OpenEXRUtil SampleCountChannel endEdit() can loop forever on UINT_MAX sample counts
- Details
-
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 UINTMAX: the sequence reaches 0x80000000, and the next left shift wraps the 32-bit value to 0. Because 0 remains less than UINTMAX, 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.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55373.json", "cwe_ids": [ "CWE-190", "CWE-400", "CWE-835" ], "cna_assigner": "GitHub_M" }- References
Affected packages
Git / github.com/academysoftwarefoundation/openexr
Affected ranges
- Type
- GIT
- Repo
- https://github.com/academysoftwarefoundation/openexr
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedIntroducedFixedIntroducedFixed
- Database specific
-
Show details
{ "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "0" }, { "fixed": "3.2.10" }, { "introduced": "3.3.0" }, { "fixed": "3.3.12" }, { "introduced": "3.4.0" }, { "fixed": "3.4.13" } ] }