CVE-2026-44983

Name	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rust-smallbitvec (PTS)	bookworm, trixie	2.5.1-1	vulnerable
	sid, forky	2.6.1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rust-smallbitvec	source	(unstable)	2.6.1-1

Notes

[trixie] - rust-smallbitvec <no-dsa> (Minor issue)
[bookworm] - rust-smallbitvec <no-dsa> (Minor issue)
https://github.com/servo/smallbitvec/security/advisories/GHSA-97wc-2hqc-cjgr