CVE-2019-15551: Servo Smallvec

Critical severity, CVSS 9.8. EPSS: 1.9% chance of exploitation in the next 30 days.

An issue was discovered in the smallvec crate before 0.6.10 for Rust. There is a double free for certain grow attempts with the current capacity.

Affected products

• Servo Smallvec: from 0.6.5, before 0.6.10 (fixed in 0.6.10)

Published 2019-08-26. Last modified 2026-06-17.