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 trigg

Q: How do I fix CVE-2023-22895?

bzip2: upgrade to 0.4.4. Exact commands for each OS are on this page.

Q: Is CVE-2023-22895 being exploited?

CVE-2023-22895 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-22895 affect?

CVE-2023-22895 affects bzip2. Severity is high (CVSS 7.5). 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.

Q: How urgent is CVE-2023-22895?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2023-22895 is a high-severity flaw (CVSS 7.5) affecting bzip2. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-190
Published	2023-01-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: bzip2 project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-01-10 01:15 UTCPublished CVE record published
2026-06-17 05:36 UTCUpdated Record last modified

bzip2 project bzip2 UPGRADE

Affected: < 0.4.4

Fixed in: 0.4.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy bzip2 || rpm -q bzip2 || bzip2 --version

2. UPGRADE to 0.4.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade bzip2

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade bzip2

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-22895?

bzip2: upgrade to 0.4.4. Exact commands for each OS are on this page.

Is CVE-2023-22895 being exploited?

CVE-2023-22895 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-22895 affect?

CVE-2023-22895 affects bzip2. Severity is high (CVSS 7.5). 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.

How urgent is CVE-2023-22895?

Priority 54/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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