CVE-2026-44983
smallbitvec: Safe API Triggered Heap Buffer Overflow via Integer Overflow
CVSS Score
7.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-122 CWE-190 |
| Vendor | servo |
| Product | smallbitvec |
| Published | May 26, 2026 |
| Last Updated | May 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
High
Affected Versions
servo / smallbitvec
>= 1.0.1, < 2.6.1