# CVE-2026-44983: rust-smallbitvec: smallbitvec is a growable bit-vector for Rust, optimized for size

CVE-2026-44983 is fixed in rust-smallbitvec on 1 platform by DEBIAN-CVE-2026-44983 (version 2.6.1-1), released June 24, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-44983
- Priority: High
- CVSS: 7.3 (high)
- EPSS: 0.0015
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 26, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | rust-smallbitvec Debian 14 | 2.6.1-1 | [DEBIAN-CVE-2026-44983](https://patchblox.com/security/data/fix/linux/debian-cve-2026-44983.md) | Jun 24, 2026 |

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Data as of 2026-11-09T13:31:49Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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