CVE-2018-3923: A memory corruption vulnerability exists in the PCX-parsing functionality of Computerinsel Photoline 20.54

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HIGH 7.8DOWNGRADE

CVE-2018-3923 is a high-severity flaw (CVSS 7.8) affecting photoline. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A memory corruption vulnerability exists in the PCX-parsing functionality of Computerinsel Photoline 20.54. A specially crafted PCX image processed via the application can lead to an out-of-bounds write, overwriting arbitrary data. An attacker can deliver a PCX image to trigger this vulnerability and gain code execution.

Why this priority

High severity
Public exploit reference

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

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.5% (top 26%)
CISA exploited list	No
Weakness	CWE-787
Published	2018-08-01
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: pl32

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

Am I affected?

Timeline

2018-08-01 15:29 UTCPublished CVE record published
2026-06-17 01:58 UTCUpdated Record last modified

pl32 photoline DOWNGRADE

Affected: 20.54

Fixed in: no fixed release known

Safe to downgrade to: a release before 20.54

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 20.54 (Debian / Ubuntu)

apt-cache madison photoline sudo apt install photoline=<VERSION_BEFORE_20.54> sudo apt-mark hold photoline

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

dnf --showduplicates list photoline sudo dnf downgrade photoline-<VERSION_BEFORE_20.54> sudo dnf versionlock add photoline

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-2018-3923?

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

Is CVE-2018-3923 being exploited?

CVE-2018-3923 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-2018-3923 affect?

CVE-2018-3923 affects photoline. Severity is high (CVSS 7.8). A memory corruption vulnerability exists in the PCX-parsing functionality of Computerinsel Photoline 20.54. A specially crafted PCX image processed via the application can lead to an out-of-bounds write, overwriting arbitrary data. An attac

How urgent is CVE-2018-3923?

Priority 51/100. High severity; Public exploit reference

Related CVEs

CVE-2018-3922 HIGH 7.8 DOWNGRADE A memory corruption vulnerability exists in the ANI-parsing functionality of Computerinsel Photoline 20.54
CVE-2018-3921 HIGH 7.8 DOWNGRADE A memory corruption vulnerability exists in the PSD-parsing functionality of Computerinsel Photoline 20.54
CVE-2018-3889 HIGH 7.8 DOWNGRADE A specially crafted PCX image processed via the application can lead to an out-of-bounds write, overwriting ar
CVE-2018-3888 HIGH 7.8 DOWNGRADE A memory corruption vulnerability exists in the PCX-parsing functionality of Computerinsel Photoline 20.53
CVE-2018-3887 HIGH 7.8 DOWNGRADE A memory corruption vulnerability exists in the PCX-parsing functionality of Computerinsel Photoline 20.53

References

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