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.
Suricata 是一款网络入侵检测系统（IDS）、入侵防御系统（IPS）和网络监控引擎。 在 7.0.16 和 8.0.5 版本之前，当链式转换（chained transform）导致底层缓冲区被重新分配时，Suricata 的检验缓冲区辅助函数可能会保留一个指向已释放内存的检验指针。该问题会在处理特定网络流量期间触发，并且需要一条特定的、但并非恶意的规则。 7.0.16 和 8.0.5 版本中包含针对此问题的修复。作为临时解决方案，应避免使用在其他转换之后链式调用 转换的规则。
Possible ATT&CK Techniques 2 AI
T1133 · External Remote Services T1218 · System Binary Proxy Execution
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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
Affected Products
II. Public POCs for CVE-2026-45751
| # | POC Description | Source Link | Shenlong Link |
|---|
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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)
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🔗 Open Information Security Foundation x_refsource_MISC
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
-
CVE-2026-45770
Suricata lua: excessive flow variable registration can bypas -
CVE-2026-45769
ikev2: unbounded client transform storage can lead to resour -
CVE-2026-45768
Suricata ldap: unbounded responses per transaction can lead -
CVE-2026-45767
Suricata datasets: save to absolute filename can be bypassed -
CVE-2026-45766
Suricata nfs: unbounded stateful structures can lead to reso
Same vendor: OISF
-
CVE-2026-45770
Suricata lua: excessive flow variable registration can bypas -
CVE-2026-45769
ikev2: unbounded client transform storage can lead to resour -
CVE-2026-45768
Suricata ldap: unbounded responses per transaction can lead -
CVE-2026-45767
Suricata datasets: save to absolute filename can be bypassed -
CVE-2026-45766
Suricata nfs: unbounded stateful structures can lead to reso
Same weakness: CWE-416
-
CVE-2026-45752
Suricata detect/transform: use-after-free in decompress tran -
CVE-2026-88032
Application denial of service via cancellation race in react -
CVE-2026-87933
DaveGamble cJSON cJSON_Utils.c cJSONUtils_MergePatch use aft -
CVE-2026-87877
zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free via Setters -
CVE-2026-87825
zstd-jni 1.3.8-4 through 1.5.7-13 Use-After-Free of Compress
V. Comments for CVE-2026-45751
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