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CVE-2025-29918— Suricata pcre: negated pcr can cause infinite loop

Quick assessment

Affected
OISF suricata
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Suricata是Open Information Security基金会的一个网络IDS、IPS和NSM引擎。 Suricata存在安全漏洞，该漏洞源于PCRE规则问题，可能导致无限循环。

CVSS 6.2 · Medium EPSS 0.27% · P18
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I. Basic Information for CVE-2025-29918

Vulnerability Information
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Vulnerability Title
Suricata pcre: negated pcr can cause infinite loop
Source: CVE Program / CVE List V5
Vulnerability Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. A PCRE rule can be written that leads to an infinite loop when negated PCRE is used. Packet processing thread becomes stuck in infinite loop limiting visibility and availability in inline mode. This vulnerability is fixed in 7.0.9.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不可达退出条件的循环(无限循环)
Source: CVE Program / CVE List V5
Vulnerability Title
Suricata 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Suricata是Open Information Security基金会的一个网络IDS、IPS和NSM引擎。 Suricata存在安全漏洞，该漏洞源于PCRE规则问题，可能导致无限循环。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OISF suricata < 7.0.9 -

II. Public POCs for CVE-2025-29918

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III. Intelligence Information for CVE-2025-29918

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Same Patch Batch · OISF · 2025-04-10 · 4 CVEs total

CVE-2025-29915 7.5 HIGH Suricata af-packet: defrag option can lead to truncated packets affecting visibility
CVE-2025-29916 6.2 MEDIUM Suricata datasets: ruleset declared settings can lead to resource starvation
CVE-2025-29917 6.2 MEDIUM Suricata decode_base64: signature can do large memory allocation

IV. Related Vulnerabilities

Same product: suricata
Same vendor: OISF
Same weakness: CWE-835

V. Comments for CVE-2025-29918

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