CVE-2021-44144: Croatia Control Asterix 2.8.1 has a heap-based buffer over-read, with additional details to be disclosed at a

This month

CRITICAL 9.1REMOTEDOWNGRADE

CVE-2021-44144 is a critical-severity flaw (CVSS 9.1) affecting asterix. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Croatia Control Asterix 2.8.1 has a heap-based buffer over-read, with additional details to be disclosed at a later date.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 33%)
CISA exploited list	No
Weakness	CWE-125
Published	2021-11-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: crocontrol

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

Am I affected?

Timeline

2021-11-22 21:15 UTCPublished CVE record published
2026-06-17 04:11 UTCUpdated Record last modified

crocontrol asterix DOWNGRADE

Affected: 2.8.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.8.1

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.8.1 (Debian / Ubuntu)

apt-cache madison asterix sudo apt install asterix=<VERSION_BEFORE_2.8.1> sudo apt-mark hold asterix

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

dnf --showduplicates list asterix sudo dnf downgrade asterix-<VERSION_BEFORE_2.8.1> sudo dnf versionlock add asterix

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.

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-2021-44144?

asterix: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-44144 being exploited?

CVE-2021-44144 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-2021-44144 affect?

CVE-2021-44144 affects asterix. Severity is critical (CVSS 9.1). Croatia Control Asterix 2.8.1 has a heap-based buffer over-read, with additional details to be disclosed at a later date.

How urgent is CVE-2021-44144?

Priority 54/100. Critical severity; Remotely exploitable, no login, no user action

References

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