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TI-2018-14953 Aliases CVE-2018-20991GHSA-rxr4-x558-x7hw

An issue was discovered in the smallvec crate before 0.6.3 for Rust.

Priority MEDIUM 46CWE-415Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-415 and the CVSS impact.

Summary

An issue was discovered in the smallvec crate before 0.6.3 for Rust. The Iterator implementation mishandles destructors, leading to a double free.

Why it matters now

EPSS 0.01848 79th percentileScored 2026-11-07
Fix Fixed smallvec (crates.io): 0.6.3

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—smallvec (crates.io)0.3.2 to before 0.6.30.6.3Patch availableGHSA-rxr4-x558-x7hw
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • smallvec (crates.io) Vendor— Affected 0.3.2 to before 0.6.3 Fixed in 0.6.3 Patch available GHSA-rxr4-x558-x7hw

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:servo:smallvec:*:*:*:*:*:*:*:*0.3.2 to before 0.6.3Vulnerableservo
  • cpe:2.3:a:servo:smallvec:*:*:*:*:*:*:*:* Versions 0.3.2 to before 0.6.3 Vulnerable ·servo

Remediation

  • Fix · GHSA-rxr4-x558-x7hw smallvec (crates.io) Fixed in 0.6.3 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-20991
  2. 2026-10-03 Alias added: GHSA-rxr4-x558-x7hw

References

Advisory 2

Other 2

  • TI-2019-11654 An issue was discovered in the smallvec crate before 0.6.10 for Rust. CVSS 3.0CRITICAL 9.8
  • TI-2019-11651 An issue was discovered in the smallvec crate before 0.6.10 for Rust. CVSS 3.0CRITICAL 9.8
  • TI-2021-07911 An issue was discovered in the smallvec crate before 0.6.14 and 1.x before 1.6.1 for Rust. CVSS 3.1CRITICAL 9.8
  • TI-2018-15250 An issue was discovered in the smallvec crate before 0.6.13 for Rust. CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences