CVE-2022-39274: LoRaMac-node is a reference implementation and documentation of a LoRa network node

Q: How do I fix CVE-2022-39274?

loramac-node: upgrade to 4.7.0. Exact commands for each OS are on this page.

Q: Is CVE-2022-39274 being exploited?

CVE-2022-39274 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-2022-39274 affect?

CVE-2022-39274 affects loramac-node. Severity is high (CVSS 7.5). LoRaMac-node is a reference implementation and documentation of a LoRa network node. Versions of LoRaMac-node prior to 4.7.0 are vulnerable to a buffer overflow. Improper size validation of the incoming radio frames can lead to an 65280-byt

Q: How urgent is CVE-2022-39274?

Priority 52/100. High severity; Public exploit reference

This month

HIGH 7.5UPGRADE

CVE-2022-39274 is a high-severity flaw (CVSS 7.5) affecting loramac-node. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

LoRaMac-node is a reference implementation and documentation of a LoRa network node. Versions of LoRaMac-node prior to 4.7.0 are vulnerable to a buffer overflow. Improper size validation of the incoming radio frames can lead to an 65280-byte out-of-bounds write. The function `ProcessRadioRxDone` implicitly expects incoming radio frames to have at least a payload of one byte or more. An empty payload leads to a 1-byte out-of-bounds read of user co

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Weakness	CWE-120, CWE-193
Published	2022-10-06
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: semtech

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

Am I affected?

Timeline

2022-10-06 18:16 UTCPublished CVE record published
2026-06-17 04:58 UTCUpdated Record last modified

semtech loramac-node UPGRADE

Affected: < 4.7.0

Fixed in: 4.7.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy loramac-node || rpm -q loramac-node || loramac-node --version

2. UPGRADE to 4.7.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade loramac-node

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade loramac-node

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-2022-39274?

loramac-node: upgrade to 4.7.0. Exact commands for each OS are on this page.

Is CVE-2022-39274 being exploited?

CVE-2022-39274 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-2022-39274 affect?

CVE-2022-39274 affects loramac-node. Severity is high (CVSS 7.5). LoRaMac-node is a reference implementation and documentation of a LoRa network node. Versions of LoRaMac-node prior to 4.7.0 are vulnerable to a buffer overflow. Improper size validation of the incoming radio frames can lead to an 65280-byt

How urgent is CVE-2022-39274?

Priority 52/100. High severity; Public exploit reference

Related CVEs

CVE-2020-11068 MEDIUM 5.0 UPGRADE In LoRaMac-node before 4.4.4, a reception buffer overflow can happen due to the received buffer size not being

References

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