CVE-2026-44983 (GCVE-0-2026-44983)

Vulnerability from cvelistv5 – Published: 2026-05-26 21:38 – Updated: 2026-05-27 12:45
VLAI
Title
smallbitvec: Safe API Triggered Heap Buffer Overflow via Integer Overflow
Summary
smallbitvec is a growable bit-vector for Rust, optimized for size. From 1.0.1 to 2.6.0, an integer overflow in the internal capacity calculation of smallbitvec can lead to an undersized heap allocation, resulting in a heap buffer overflow through safe APIs only. This allows memory corruption without requiring unsafe code from the caller. This vulnerability is fixed in 2.6.1.
Severity
7.3 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-27 12:45 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
  • CWE-190 - Integer Overflow or Wraparound
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7664 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
servo smallbitvec Affected: >= 1.0.1, < 2.6.1
guessed Create a notification for this product.
Show details on NVD website
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