CVE-2021-34085: Read access violation in the III_dequantize_sample function in mpglibDBL/layer3.c in mp3gain through 1.5.2-r2

Q: How do I fix CVE-2021-34085?

mp3gain: upgrade to 1.5.2. Exact commands for each OS are on this page.

Q: Is CVE-2021-34085 being exploited?

CVE-2021-34085 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-2021-34085 affect?

CVE-2021-34085 affects mp3gain. Severity is critical (CVSS 9.8). Read access violation in the III_dequantize_sample function in mpglibDBL/layer3.c in mp3gain through 1.5.2-r2 allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact, a different vu

Q: How urgent is CVE-2021-34085?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2021-34085 is a critical-severity flaw (CVSS 9.8) affecting mp3gain. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Read access violation in the III_dequantize_sample function in mpglibDBL/layer3.c in mp3gain through 1.5.2-r2 allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact, a different vulnerability than CVE-2017-9872. CVE-2017-14409, and CVE-2018-10778.

Why this priority

Critical severity
Public exploit reference
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	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-125
Published	2022-05-11
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: glensawyer

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

Am I affected?

Timeline

2022-05-11 18:15 UTCPublished CVE record published
2026-06-17 03:55 UTCUpdated Record last modified

glensawyer mp3gain UPGRADE

Affected: < 1.5.2 · 1.5.2 · 1.5.2 r1 · 1.5.2 r2

Fixed in: 1.5.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy mp3gain || rpm -q mp3gain || mp3gain --version

2. UPGRADE to 1.5.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mp3gain

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mp3gain

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-2021-34085?

mp3gain: upgrade to 1.5.2. Exact commands for each OS are on this page.

Is CVE-2021-34085 being exploited?

CVE-2021-34085 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-2021-34085 affect?

CVE-2021-34085 affects mp3gain. Severity is critical (CVSS 9.8). Read access violation in the III_dequantize_sample function in mpglibDBL/layer3.c in mp3gain through 1.5.2-r2 allows remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact, a different vu

How urgent is CVE-2021-34085?

Priority 64/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2023-49356 HIGH 7.5 DOWNGRADE A stack buffer overflow vulnerability in MP3Gain v1.6.2 allows an attacker to cause a denial of service via th
CVE-2019-18359 MEDIUM 5.5 DOWNGRADE A buffer over-read was discovered in ReadMP3APETag in apetag.c in MP3Gain 1.6.2
CVE-2018-10778 HIGH 7.8 UPGRADE Read access violation in the III_dequantize_sample function in mpglibDBL/layer3.c in mp3gain through 1.5.2-r2
CVE-2018-10777 HIGH 7.8 UPGRADE Buffer overflow in the WriteMP3GainAPETag function in apetag.c in mp3gain through 1.5.2-r2 allows remote attac
CVE-2018-10776 HIGH 7.8 UPGRADE The getbits function in mpglibDBL/common.c in mp3gain through 1.5.2-r2 allows remote attackers to cause a deni

References

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