# CVE-2026-15551: Samsung rlottie integer overflow in span Y coordinate rendering

Source: https://junglewise.ai/threats/cve-2026-15551-samsung-rlottie-integer-overflow-in-span-y-coordinate-rendering  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-13. Updated: 2026-07-13  
License: CC BY 4.0 with a link back

CVE-2026-15551 · Severity: medium · CVSS 5.5 · Published 2026-07-13

Samsung rlottie is an open-source library used for rendering vector animations, commonly found in mobile apps and smart appliances. A vulnerability in how the library handles animation coordinates could allow a malicious file to cause a system crash or potentially execute unauthorized code. This could impact the stability of the device or the security of user data if a user is tricked into opening a specially crafted animation file.

Technologies: [Samsung Rlottie](https://junglewise.ai/threats/technologies/rlottie). Vendors: [Samsung](https://junglewise.ai/threats/vendors/samsung).

## Quick answers

**Is CVE-2026-15551 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-15551 being exploited in the wild.

**How severe is CVE-2026-15551?** Medium severity, with a CVSS score of 5.5, published 13 July 2026.

**Which products and versions are affected?** Samsung Rlottie Prior to commit f487eff.

**Is there a fix for CVE-2026-15551?** A patch was published on 2026-07-03: Fix merged into master branch via commit f487eff Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-15551 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-15551?** Check whether you run Samsung Rlottie at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An integer overflow vulnerability (CWE-190) exists in Samsung's rlottie library due to improper coordinate clamping. The root cause is a narrowing conversion where a 32-bit integer coordinate is stored into a 16-bit short field (`SW_FT_Span.y`) without adequate bounds checking. Because the library inherited clamping logic from FreeType that assumed a 32-bit destination, the existing `INT_MAX` check failed to prevent truncation when the value was assigned to the 16-bit short. An attacker can exploit this by providing a crafted animation file that triggers a heap buffer overflow. Exploitation requires local access and user interaction (opening a file) and is hindered by high complexity. A fix was merged in July 2026 via pull request #595.

## Affected products

- Samsung Open Source rlottie Prior to commit f487eff

## Timeline

- 2026-07-01: disclosed: Pull request submitted to fix the overflow issue
- 2026-07-03: patched: Fix merged into master branch via commit f487eff
- 2026-07-13: advisory: CVE-2026-15551 published

## References

- [https://github.com/Samsung/rlottie/pull/595](https://github.com/Samsung/rlottie/pull/595)

## Related threats

- [Samsung rlottie heap-based buffer overflow via environment variables](https://junglewise.ai/threats/cve-2026-108978-heap-based-buffer-overflow-vulnerability-in-samsung-opensource)
- [Samsung rLottie stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-91826-samsung-rlottie-stack-based-buffer-overflow)
- [Samsung rLottie out-of-bounds read in stb_image](https://junglewise.ai/threats/cve-2026-49509-samsung-rlottie-out-of-bounds-read-in-stb-image)
- [Samsung rlottie uncontrolled recursion in shape group parsing](https://junglewise.ai/threats/cve-2026-82797-samsung-rlottie-uncontrolled-recursion-in-shape-group-parsing)
- [Samsung rlottie integer overflow to buffer overflow](https://junglewise.ai/threats/cve-2026-19588-samsung-rlottie-integer-overflow-to-buffer-overflow)