CVE-2006-3018: Unspecified vulnerability in the session extension functionality in PHP before 5.1.3 has unknown impact and at

Q: How do I fix CVE-2006-3018?

php: upgrade to newer than 5.1.2. Exact commands for each OS are on this page.

Q: Is CVE-2006-3018 being exploited?

CVE-2006-3018 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-2006-3018 affect?

CVE-2006-3018 affects php. Severity is high (CVSS 7.5). Unspecified vulnerability in the session extension functionality in PHP before 5.1.3 has unknown impact and attack vectors related to heap corruption.

This month

HIGH 7.5UPGRADE

CVE-2006-3018 is a high-severity flaw (CVSS 7.5) affecting php. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Unspecified vulnerability in the session extension functionality in PHP before 5.1.3 has unknown impact and attack vectors related to heap corruption.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	2.0% (top 19%)
CISA exploited list	No
Published	2006-06-14
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: php group

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2006-06-14 23:02 UTCPublished CVE record published
2026-06-16 22:26 UTCUpdated Record last modified

php group php UPGRADE

Affected: <= 5.1.2

Fixed in: newer than 5.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 5.1.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade php

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-2006-3018?

php: upgrade to newer than 5.1.2. Exact commands for each OS are on this page.

Is CVE-2006-3018 being exploited?

CVE-2006-3018 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-2006-3018 affect?

CVE-2006-3018 affects php. Severity is high (CVSS 7.5). Unspecified vulnerability in the session extension functionality in PHP before 5.1.3 has unknown impact and attack vectors related to heap corruption.

How urgent is CVE-2006-3018?

Priority 46/100. High severity

Software pages

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References

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