CVE-2020-20412: lib/codebook.c in libvorbis before 1.3.6, as used in StepMania 5.0.12 and other products, has insufficient arr

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MEDIUM 6.5DOWNGRADEUPGRADE

CVE-2020-20412 is a medium-severity flaw (CVSS 6.5) affecting stepmania, libvorbis. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

lib/codebook.c in libvorbis before 1.3.6, as used in StepMania 5.0.12 and other products, has insufficient array bounds checking via a crafted OGG file. NOTE: this may overlap CVE-2018-5146.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-129
Published	2020-12-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: stepmania · xiph.org

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

Am I affected?

Timeline

2020-12-26 04:15 UTCPublished CVE record published
2026-06-17 03:02 UTCUpdated Record last modified

stepmania stepmania DOWNGRADE

Affected: 5.0.12

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.12

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.0.12 (Debian / Ubuntu)

apt-cache madison stepmania sudo apt install stepmania=<VERSION_BEFORE_5.0.12> sudo apt-mark hold stepmania

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

dnf --showduplicates list stepmania sudo dnf downgrade stepmania-<VERSION_BEFORE_5.0.12> sudo dnf versionlock add stepmania

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.

xiph.org libvorbis UPGRADE

Affected: >= 1.3.2 and < 1.3.6

Fixed in: 1.3.6

Safe to downgrade to: a release before 1.3.2

1. Check installed version

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

2. UPGRADE to 1.3.6 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libvorbis

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.3.2 (Debian / Ubuntu)

apt-cache madison libvorbis sudo apt install libvorbis=<VERSION_BEFORE_1.3.2> sudo apt-mark hold libvorbis

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list libvorbis sudo dnf downgrade libvorbis-<VERSION_BEFORE_1.3.2> sudo dnf versionlock add libvorbis

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-2020-20412?

stepmania: downgrade or apply the listed mitigation; libvorbis: upgrade to 1.3.6. Exact commands for each OS are on this page.

Is CVE-2020-20412 being exploited?

CVE-2020-20412 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-2020-20412 affect?

CVE-2020-20412 affects stepmania, libvorbis. Severity is medium (CVSS 6.5). lib/codebook.c in libvorbis before 1.3.6, as used in StepMania 5.0.12 and other products, has insufficient array bounds checking via a crafted OGG file. NOTE: this may overlap CVE-2018-5146.

How urgent is CVE-2020-20412?

Priority 44/100. Public exploit reference

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CVE-2022-25010 CRITICAL 9.1 UPGRADE The component /rootfs in RageFile of Stepmania v5.1b2 and below allows attackers access to the entire file sys

References

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