CVE-2021-46312: An issue was discovered IW44EncodeCodec.cpp in djvulibre 3.5.28 in allows attackers to cause a denial of servi

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MEDIUM 6.5DOWNGRADE

CVE-2021-46312 is a medium-severity flaw (CVSS 6.5) affecting djvulibre. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered IW44EncodeCodec.cpp in djvulibre 3.5.28 in allows attackers to cause a denial of service via divide by zero.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

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-369
Published	2023-08-22
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: djvulibre project

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

Am I affected?

Timeline

2023-08-22 19:16 UTCPublished CVE record published
2026-06-17 04:14 UTCUpdated Record last modified

djvulibre project djvulibre DOWNGRADE

Affected: 3.5.28

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.5.28

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 3.5.28 (Debian / Ubuntu)

apt-cache madison djvulibre sudo apt install djvulibre=<VERSION_BEFORE_3.5.28> sudo apt-mark hold djvulibre

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

dnf --showduplicates list djvulibre sudo dnf downgrade djvulibre-<VERSION_BEFORE_3.5.28> sudo dnf versionlock add djvulibre

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-2021-46312?

djvulibre: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2021-46312 being exploited?

CVE-2021-46312 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-2021-46312 affect?

CVE-2021-46312 affects djvulibre. Severity is medium (CVSS 6.5). An issue was discovered IW44EncodeCodec.cpp in djvulibre 3.5.28 in allows attackers to cause a denial of service via divide by zero.

How urgent is CVE-2021-46312?

Priority 44/100. Public exploit reference

Related CVEs

CVE-2021-46310 MEDIUM 6.5 DOWNGRADE An issue was discovered IW44Image.cpp in djvulibre 3.5.28 in allows attackers to cause a denial of service via

References

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