No exploitation reportedFix available

CVE-2008-2108

Q: Is CVE-2008-2108 actively exploited?

Active exploitation of CVE-2008-2108 has not been confirmed. Its EPSS score was 4.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2008-2108?

CVE-2008-2108 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2008-05-07
WeaknessCWE-331

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

The GENERATE_SEED macro in PHP 4.x before 4.4.8 and 5.x before 5.2.5, when running on 64-bit systems, performs a multiplication that generates a portion of zero bits during conversion due to insufficient precision, which produces 24 bits of entropy and simplifies brute force attacks against protection mechanisms that use the rand and mt_rand functions.

Timeline

dates in UTC

2008-05-0721:20CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2008-2108?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2008-2108?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Canonical ubuntu linux

Branch	Affected	Fixed in	Source
6.6	= 6.06	no fix published	NVD
7.4	= 7.04	no fix published	NVD
7.10	= 7.10	no fix published	NVD
8.4	= 8.04	no fix published	NVD

Fedoraproject fedora

Branch	Affected	Fixed in	Source
8.x	= 8	no fix published	NVD
9.x	= 9	no fix published	NVD

PHP

Branch	Affected	Fixed in	Source
5.x	≥ 5.0.0, < 5.2.5	5.2.5	NVD
4.x	≥ 4.0.0, < 4.4.8	4.4.8	NVD

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.19.8read 2026-10-23
NVDCVSS 2.07.5read 2026-10-23
NVDweakness (CWE)CWE-331read 2026-10-23
FIRST EPSSEPSS score4.3 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2008-05-07
Last Modified: 2026-06-16
NVD status: Modified

Frequently asked questions

What is CVE-2008-2108?

Is CVE-2008-2108 actively exploited?

Active exploitation of CVE-2008-2108 has not been confirmed. Its EPSS score was 4.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2008-2108?

CVE-2008-2108 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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