CVE-2022-41861: A flaw was found in freeradius

Q: How do I fix CVE-2022-41861?

freeradius: upgrade to newer than 3.0.25. Exact commands for each OS are on this page.

Q: Is CVE-2022-41861 being exploited?

CVE-2022-41861 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-2022-41861 affect?

CVE-2022-41861 affects freeradius. Severity is medium (CVSS 6.5). A flaw was found in freeradius. A malicious RADIUS client or home server can send a malformed abinary attribute which can cause the server to crash.

Q: How urgent is CVE-2022-41861?

Priority 39/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADE

CVE-2022-41861 is a medium-severity flaw (CVSS 6.5) affecting freeradius. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flaw was found in freeradius. A malicious RADIUS client or home server can send a malformed abinary attribute which can cause the server to crash.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.1% (top 33%)
CISA exploited list	No
Weakness	CWE-400, CWE-20
Published	2023-01-17
Last modified	2026-06-17

Publisher (CNA): Red Hat, Inc. · Vendor: freeradius

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

Am I affected?

Timeline

2023-01-17 18:15 UTCPublished CVE record published
2026-06-17 05:03 UTCUpdated Record last modified

freeradius freeradius UPGRADE

Affected: <= 3.0.25

Fixed in: newer than 3.0.25

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 3.0.25 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade freeradius

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-2022-41861?

freeradius: upgrade to newer than 3.0.25. Exact commands for each OS are on this page.

Is CVE-2022-41861 being exploited?

CVE-2022-41861 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-2022-41861 affect?

CVE-2022-41861 affects freeradius. Severity is medium (CVSS 6.5). A flaw was found in freeradius. A malicious RADIUS client or home server can send a malformed abinary attribute which can cause the server to crash.

How urgent is CVE-2022-41861?

Priority 39/100. No elevated risk signals yet.

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References

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