CVE-2026-44983

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.

CVSS v3 7.3 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.5 / Impact : 4.7

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr
https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr

Configurations

No configuration.

History

23 Jul 2026, 11:10

Type	Values Removed	Values Added
Summary		(es) smallbitvec es un vector de bits redimensionable para Rust, optimizado para el tamaño. De 1.0.1 a 2.6.0, un desbordamiento de entero en el cálculo interno de capacidad de smallbitvec puede conducir a una asignación de memoria en el heap de tamaño insuficiente, lo que resulta en un desbordamiento de búfer en el heap únicamente a través de APIs seguras. Esto permite la corrupción de memoria sin requerir código inseguro por parte del llamador. Esta vulnerabilidad está corregida en 2.6.1.

27 May 2026, 14:16

Type	Values Removed	Values Added
References	~~() https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr -~~	() https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr -

26 May 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-26 22:16

Updated : 2026-07-24 12:10

NVD link : CVE-2026-44983

Mitre link : CVE-2026-44983

CVE.ORG link : CVE-2026-44983

JSON object : View

Products Affected

No product.

CWE

CWE-122

Heap-based Buffer Overflow

CWE-190

Integer Overflow or Wraparound

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