CVE catalog
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 allocatio
- Severity
- High · CVSS 7.3
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.15% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | rust-smallbitvec | sid | 2.6.1-1 | fixed |
| Debian | rust-smallbitvec | forky | 2.6.1-1 | fixed |
| Debian | rust-smallbitvec | trixie | 2.5.1-1 | vulnerable |
| Debian | rust-smallbitvec | bookworm | 2.5.1-1 | vulnerable |
| Cpe | rust-smallbitvec | Not reported | Not reported | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | rust-smallbitvec | source | sid | 2.6.1-1 | not yet assigned | Not reported | Not reported |
| Debian | rust-smallbitvec | source | forky | 2.6.1-1 | not yet assigned | Not reported | Not reported |
| Debian | rust-smallbitvec | source | trixie | (unfixed) | not yet assigned | Not reported | Not reported |
| Debian | rust-smallbitvec | source | bookworm | (unfixed) | not yet assigned | Not reported | Not reported |
Notes
[trixie] rust-smallbitvec: Minor issue [bookworm] rust-smallbitvec: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [librust-smallbitvec-dev]Affected
Source package: [rust-smallbitvec]
Details (2)
2.5.1-1+b1· amd64 · bookwormAffected
nvd · rust-smallbitvec · debian · bookworm; nvd · rust-smallbitvec · debian · 12
2.5.1-1+b1· arm64 · bookwormAffected
nvd · rust-smallbitvec · debian · bookworm; nvd · rust-smallbitvec · debian · 12
[Debian 13 (Trixie)]
- [librust-smallbitvec-dev]Affected
Source package: [rust-smallbitvec]
Details (2)
2.5.1-1+b2· amd64 · trixieAffected
nvd · rust-smallbitvec · debian · 13
2.5.1-1+b2· arm64 · trixieAffected
nvd · rust-smallbitvec · debian · 13
Observed: