CVE-2026-44983
High
Description
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.
SeverityHigh
CVSS7.3
Exploit probability—
ProductServo Smallbitvec
PublishedMay 26, 2026
First seenMay 26, 2026
Weakness typeCWE-122CWE-122CWE-190Integer overflow
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| servo smallbitvec | >= 1.0.1, < 2.6.1 | — |
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