CVE-2026-44983

high

Published 2026-05-26 · Modified 2026-06-01

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CVSS v3

7.3

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

7.3

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.

Predictions

Exploit likelihood

72%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

Debian Mixed 4 releases

Version	Status	Fixed in
trixie	Affected	—
sid	Fixed	`2.6.1-1`
forky	Fixed	`2.6.1-1`
bookworm	Affected	—

Package impact

Ecosystem	Package	Vulnerable	Fixed
crates.io	smallbitvec	`>=1.0.1,<=2.6.0`
RUST	smallbitvec	`>= 1.0.1, <= 2.6.0`

References

CWEs

CWE-122 CWE-190

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.