CVE-2026-44983

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.

PUBLISHED Reserved 2026-05-08 | Published 2026-05-26 | Updated 2026-05-26 | Assigner GitHub_M

Problem types

CWE-122: Heap-based Buffer Overflow

CWE-190: Integer Overflow or Wraparound

Product status

References

github.com/...bitvec/security/advisories/GHSA-97wc-2hqc-cjgr

cve.org (CVE-2026-44983)

nvd.nist.gov (CVE-2026-44983)

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