CVE-2022-23318: A heap-buffer-overflow in pcf2bdf, versions >= 1.05 allows an attacker to trigger unsafe memory access via a s

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HIGH 7.1DOWNGRADE

CVE-2022-23318 is a high-severity flaw (CVSS 7.1) affecting pcf2bdf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A heap-buffer-overflow in pcf2bdf, versions >= 1.05 allows an attacker to trigger unsafe memory access via a specially crafted PCF font file. This out-of-bound read may lead to an application crash, information disclosure via program memory or other context-dependent impact.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.1 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-787
Published	2022-02-17
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: pcf2bdf project

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

Am I affected?

Timeline

2022-02-17 13:15 UTCPublished CVE record published
2026-06-17 04:29 UTCUpdated Record last modified

pcf2bdf project pcf2bdf DOWNGRADE

Affected: 1.04 · 1.05

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.04

1. Check installed version

apt-cache policy pcf2bdf || rpm -q pcf2bdf || pcf2bdf --version

2. No fixed release: DOWNGRADE to a release before 1.04 (Debian / Ubuntu)

apt-cache madison pcf2bdf sudo apt install pcf2bdf=<VERSION_BEFORE_1.04> sudo apt-mark hold pcf2bdf

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

dnf --showduplicates list pcf2bdf sudo dnf downgrade pcf2bdf-<VERSION_BEFORE_1.04> sudo dnf versionlock add pcf2bdf

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-2022-23318?

pcf2bdf: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-23318 being exploited?

CVE-2022-23318 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-2022-23318 affect?

CVE-2022-23318 affects pcf2bdf. Severity is high (CVSS 7.1). A heap-buffer-overflow in pcf2bdf, versions >= 1.05 allows an attacker to trigger unsafe memory access via a specially crafted PCF font file. This out-of-bound read may lead to an application crash, information disclosure via program memory

How urgent is CVE-2022-23318?

Priority 44/100. High severity; Public exploit reference

Related CVEs

CVE-2022-23319 MEDIUM 5.5 DOWNGRADE A segmentation fault during PCF file parsing in pcf2bdf versions >=1.05 allows an attacker to trigger a progra

References

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