CVE-2022-32324: PDFAlto v0.4 was discovered to contain a heap buffer overflow via the component /pdfalto/src/pdfalto.cc.

This week

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2022-32324 is a critical-severity flaw (CVSS 9.8) affecting pdfalto. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PDFAlto v0.4 was discovered to contain a heap buffer overflow via the component /pdfalto/src/pdfalto.cc.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

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

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 32%)
CISA exploited list	No
Weakness	CWE-787
Published	2022-07-01
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pdfalto project

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

Am I affected?

Timeline

2022-07-01 22:15 UTCPublished CVE record published
2026-06-17 04:47 UTCUpdated Record last modified

pdfalto project pdfalto DOWNGRADE

Affected: 0.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.4

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 0.4 (Debian / Ubuntu)

apt-cache madison pdfalto sudo apt install pdfalto=<VERSION_BEFORE_0.4> sudo apt-mark hold pdfalto

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

dnf --showduplicates list pdfalto sudo dnf downgrade pdfalto-<VERSION_BEFORE_0.4> sudo dnf versionlock add pdfalto

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-2022-32324?

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

Is CVE-2022-32324 being exploited?

CVE-2022-32324 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-2022-32324 affect?

CVE-2022-32324 affects pdfalto. Severity is critical (CVSS 9.8). PDFAlto v0.4 was discovered to contain a heap buffer overflow via the component /pdfalto/src/pdfalto.cc.

How urgent is CVE-2022-32324?

Priority 61/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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