memory overflow vulnerability in OpenEXR-viewer

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

• CVE-2023-50245: 1.05% estimated exploitation activity in the next 30 days; percentile 64.31 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Just open this exr file through openexr-viewer. ( poc send by email ) This is windbg log file. [ POC 2 ] (8660.7e44): Access violation - code c0000005 (!!! second chance !!!) openexrviewer+0x27be4: 00007ff713ff7be4 c744880c0000803f mov dword ptr [rax+rcx4+0Ch],3F800000h ds:0000020a3ac8000c=???????? Attempt to write the value 1.0 to the memory address 0x20A3AC8000C [ POC 1 ] (1404.9264): Access violation - code c0000005 (first chance) First chance exceptions are reported before any exception handling. This exception may be expected and handled. openexrviewer+0x27be4: 00007ff713ff7be4 c744880c0000803f mov dword ptr [rax+rcx4+0Ch],3F800000h ds:0000029cb371600c=???????? Attempt to write the value 1.0 to the memory address 0x29CB371600C Credits Team : ZeroPointer 이동하 ( Lee Dong Ha of ZeroPointer Lab ) 정지민 ( Jeong Jimin of ZeroPointer Lab ) 박우진 ( Park Woojin of ZeroPointer Lab ) 전우진 ( Jeon Woojin of ZeroPointer Lab )

Published by the source

12 Dec 2023, 13:20 UTC

Last modified by the source

12 Dec 2023, 13:20 UTC

Source last checked

26 Oct 2026, 17:08 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-99jg-r3f4-rpxj

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# Patch Next advisory brief: CVE-2023-50245

Advisory: memory overflow vulnerability in OpenEXR-viewer
IDs: CVE-2023-50245, GHSA-99jg-r3f4-rpxj
Record: https://patchnext.com/advisories/cve-2023-50245 (revision 1, source checked 26 Oct 2026, 17:08 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.8)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: afichet/openexr-viewer 0.6.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- GitHub Actions afichet/openexr-viewer: affected < 0.6.1; fixed in 0.6.1

## Suggested inspection (read-only)
- GitHub Actions afichet/openexr-viewer: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on afichet/openexr-viewer.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-99jg-r3f4-rpxj (GitHub-reviewed advisory GHSA-99jg-r3f4-rpxj lists affected ranges: GitHub Actions afichet/openexr-viewer >=0 <0.6.1)

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