CVE-2021-38383: OwnTone (aka owntone-server) through 28.1 has a use-after-free in net_bind() in misc.c.

Q: How do I fix CVE-2021-38383?

owntone server: upgrade to newer than 28.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-38383 being exploited?

CVE-2021-38383 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-2021-38383 affect?

CVE-2021-38383 affects owntone server. Severity is critical (CVSS 9.8). OwnTone (aka owntone-server) through 28.1 has a use-after-free in net_bind() in misc.c.

Q: How urgent is CVE-2021-38383?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2021-38383 is a critical-severity flaw (CVSS 9.8) affecting owntone server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OwnTone (aka owntone-server) through 28.1 has a use-after-free in net_bind() in misc.c.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

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	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-416
Published	2021-08-10
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: owntone

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

Am I affected?

Timeline

2021-08-10 18:15 UTCPublished CVE record published
2026-06-17 04:01 UTCUpdated Record last modified

owntone owntone server UPGRADE

Affected: <= 28.1

Fixed in: newer than 28.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy owntone-server || rpm -q owntone-server || owntone-server --version

2. UPGRADE to newer than 28.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade owntone-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade owntone-server

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-2021-38383?

owntone server: upgrade to newer than 28.1. Exact commands for each OS are on this page.

Is CVE-2021-38383 being exploited?

CVE-2021-38383 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-2021-38383 affect?

CVE-2021-38383 affects owntone server. Severity is critical (CVSS 9.8). OwnTone (aka owntone-server) through 28.1 has a use-after-free in net_bind() in misc.c.

How urgent is CVE-2021-38383?

Priority 57/100. Critical severity; Remotely exploitable, no login, no user action

References

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