CVE-2021-33897: A buffer overflow in Synthesia before 10.7.5567, when a non-Latin locale is used, allows user-assisted attacke

Q: How do I fix CVE-2021-33897?

synthesia: upgrade to newer than 10.8. Exact commands for each OS are on this page.

Q: Is CVE-2021-33897 being exploited?

CVE-2021-33897 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-2021-33897 affect?

CVE-2021-33897 affects synthesia. Severity is medium (CVSS 5.5). A buffer overflow in Synthesia before 10.7.5567, when a non-Latin locale is used, allows user-assisted attackers to cause a denial of service (application crash) via a crafted MIDI file with malformed bytes. This file is mishandled during a

Q: How urgent is CVE-2021-33897?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2021-33897 is a medium-severity flaw (CVSS 5.5) affecting synthesia. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A buffer overflow in Synthesia before 10.7.5567, when a non-Latin locale is used, allows user-assisted attackers to cause a denial of service (application crash) via a crafted MIDI file with malformed bytes. This file is mishandled during a deletion attempt. In Synthesia before 10.9, an improper path handling allows local attackers to cause a denial of service (application crash) via a crafted MIDI file with malformed bytes.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 85%)
CISA exploited list	No
Weakness	CWE-120
Published	2022-11-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: synthesiagame

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

Am I affected?

Timeline

2022-11-17 21:15 UTCPublished CVE record published
2026-06-17 03:55 UTCUpdated Record last modified

synthesiagame synthesia UPGRADE

Affected: <= 10.8

Fixed in: newer than 10.8

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 10.8 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade synthesia

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-2021-33897?

synthesia: upgrade to newer than 10.8. Exact commands for each OS are on this page.

Is CVE-2021-33897 being exploited?

CVE-2021-33897 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-2021-33897 affect?

CVE-2021-33897 affects synthesia. Severity is medium (CVSS 5.5). A buffer overflow in Synthesia before 10.7.5567, when a non-Latin locale is used, allows user-assisted attackers to cause a denial of service (application crash) via a crafted MIDI file with malformed bytes. This file is mishandled during a

How urgent is CVE-2021-33897?

Priority 23/100. No elevated risk signals yet.

References

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