CVE-2022-28044: Irzip v0.640 was discovered to contain a heap memory corruption via the component lrzip.c:initialise_control.

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CRITICAL 9.8REMOTEWATCHLISTDOWNGRADEMITIGATE

CVE-2022-28044 is a critical-severity flaw (CVSS 9.8) affecting irzip, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Irzip v0.640 was discovered to contain a heap memory corruption via the component lrzip.c:initialise_control.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-787
Published	2022-04-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: debian · irzip project

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

Am I affected?

Timeline

2022-04-15 14:15 UTCPublished CVE record published
2026-06-17 04:37 UTCUpdated Record last modified

irzip project irzip DOWNGRADE

Affected: 0.640

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.640

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.640 (Debian / Ubuntu)

apt-cache madison irzip sudo apt install irzip=<VERSION_BEFORE_0.640> sudo apt-mark hold irzip

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list irzip sudo dnf downgrade irzip-<VERSION_BEFORE_0.640> sudo dnf versionlock add irzip

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

debian debian linux MITIGATE

Affected: 9.0 · 10.0 · 11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 9.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · iodine · FIXED · 0.9.0-2.fc46 · FEDORA-2026-4448545972 · source

sudo dnf upgrade --advisory=FEDORA-2026-4448545972

Fedora ELN · python-idna · FIXED · 3.20-1.eln159 · FEDORA-2026-4421e6642f · source

sudo dnf upgrade --advisory=FEDORA-2026-4421e6642f

Ubuntu 22.04 · lrzip · FIXED · 0.651-2ubuntu0.22.04.1

sudo apt update && sudo apt install --only-upgrade lrzip dpkg --compare-versions "$(dpkg-query -W -f='${Version}' lrzip)" ge "0.651-2ubuntu0.22.04.1" && echo PATCHED || echo STILL-VULNERABLE

Ubuntu 20.04 · lrzip · FIXED · 0.631+git180528-1+deb10u1build0.20.04.1

sudo apt update && sudo apt install --only-upgrade lrzip dpkg --compare-versions "$(dpkg-query -W -f='${Version}' lrzip)" ge "0.631+git180528-1+deb10u1build0.20.04.1" && echo PATCHED || echo STILL-VULNERABLE

Debian 12 · lrzip · FIXED · 0.650-1

sudo apt update && sudo apt install --only-upgrade lrzip dpkg --compare-versions "$(dpkg-query -W -f='${Version}' lrzip)" ge "0.650-1" && echo PATCHED || echo STILL-VULNERABLE

Debian 13 · lrzip · FIXED · 0.650-1

sudo apt update && sudo apt install --only-upgrade lrzip dpkg --compare-versions "$(dpkg-query -W -f='${Version}' lrzip)" ge "0.650-1" && echo PATCHED || echo STILL-VULNERABLE

Alpine 3.20 · lrzip · FIXED · lrzip-0.650-r0

apk add --upgrade lrzip apk info -v lrzip

Alpine 3.21 · lrzip · FIXED · lrzip-0.650-r0

apk add --upgrade lrzip apk info -v lrzip

Alpine 3.22 · lrzip · FIXED · lrzip-0.650-r0

apk add --upgrade lrzip apk info -v lrzip

Alpine 3.23 · lrzip · FIXED · lrzip-0.650-r0

apk add --upgrade lrzip apk info -v lrzip

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-2022-28044?

irzip: downgrade or apply the listed mitigation; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-28044 being exploited?

CVE-2022-28044 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-2022-28044 affect?

CVE-2022-28044 affects irzip, debian linux. Severity is critical (CVSS 9.8). Irzip v0.640 was discovered to contain a heap memory corruption via the component lrzip.c:initialise_control.

How urgent is CVE-2022-28044?

Priority 69/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action; On your watchlist

Software pages

Debian vulnerabilities

References

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