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CVE-2026-45751— Suricata detect/transform: use-after-free in dotprefix transform

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.

Open Information Security Foundation Suricata是Open Information Security Foundation组织的一款实时分析网络流量并检测和防御网络入侵的安全引擎。 Open Information Security Foundation Suricata 7.0.16之前版本和8.0.0版本至8.0.5之前版本存在资源管理错误漏洞，该漏洞源于检查缓冲区辅助程序在链式转换导致后备缓冲区重新分配后，可能留下引用已释放内存的检查指针，导致释放后重用。

CVSS 5.9 · Medium EPSS 0.32% · P23

Affected Version Matrix 2

VendorProduct Version RangeStatus
OISF suricata < 7.0.16 affected
>= 8.0.0, < 8.0.5 affected
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I. Basic Information for CVE-2026-45751

Vulnerability Information
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Vulnerability Title
Suricata detect/transform: use-after-free in dotprefix transform
Source: CVE Program / CVE List V5
Vulnerability Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, Suricata's inspection-buffer helper could leave an inspection pointer referencing freed memory after a chained transform caused the backing buffer to be reallocated. The issue is reached during a specific network traffic processing, and requires a specific but not malicious rule. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, avoid rules that chain `dotprefix` transform after another one.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Open Information Security Foundation Suricata 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open Information Security Foundation Suricata是Open Information Security Foundation组织的一款实时分析网络流量并检测和防御网络入侵的安全引擎。 Open Information Security Foundation Suricata 7.0.16之前版本和8.0.0版本至8.0.5之前版本存在资源管理错误漏洞，该漏洞源于检查缓冲区辅助程序在链式转换导致后备缓冲区重新分配后，可能留下引用已释放内存的检查指针，导致释放后重用。
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 < 7.0.16 -

II. Public POCs for CVE-2026-45751

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III. Intelligence Information for CVE-2026-45751

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Vendor Advisories for CVE-2026-45751 (1)

Vendor Pages for CVE-2026-45751 (1)

Other References for CVE-2026-45751 (1)

Same Patch Batch · OISF · 2026-09-10 · 15 CVEs total

CVE-2026-45764 9.1 CRITICAL Suricata http2: protocol-change type confusion can lead to denial of service
CVE-2026-45747 7.5 HIGH Suricata lua/tls: null dereference in TlsGetCertInfo
CVE-2026-46387 7.5 HIGH Suricata http2: decompression bomb can cause denial of service in Suricata
CVE-2026-45759 7.5 HIGH Suricata http1: quadratic Content-Disposition processing can lead to denial of service
CVE-2026-45762 7.5 HIGH Suricata defrag: missing address-family check can lead to remote crash
CVE-2026-45769 7.5 HIGH ikev2: unbounded client transform storage can lead to resource exhaustion
CVE-2026-45765 7.5 HIGH Suricata dnp3: unbounded reassembly can lead to resource exhaustion
CVE-2026-45770 7.5 HIGH Suricata lua: excessive flow variable registration can bypass sandbox
CVE-2026-45768 7.5 HIGH Suricata ldap: unbounded responses per transaction can lead to resource exhaustion
CVE-2026-45766 7.5 HIGH Suricata nfs: unbounded stateful structures can lead to resource exhaustion
CVE-2026-45763 5.9 MEDIUM Suricata lua: sandbox allocation limit not enforced for new allocations
CVE-2026-45752 5.9 MEDIUM Suricata detect/transform: use-after-free in decompress transforms
CVE-2026-45767 4.4 MEDIUM Suricata datasets: save to absolute filename can be bypassed when combined with load comma
CVE-2026-45761 3.3 LOW Suricata detect: case-insensitive frame handling can cause heap buffer overflow during rul

IV. Related Vulnerabilities

Same product: suricata
Same vendor: OISF
Same weakness: CWE-416

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