CVE-2026-63449: CWE-197: Numeric Truncation Error in OISF suricata
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the SIP parser in rust/src/sip/parser.rs stores request and response body lengths in 16-bit fields. A SIP body larger than 65,536 bytes can truncate the length and prevent frame:request.body or frame:response.body from exposing the complete body to inspection, allowing content in the omitted portion to evade frame-based detection. This issue is fixed in version 8.0.6.
AI Analysis
Technical Summary
Suricata versions >=8.0.0 and <8.0.6 have a numeric truncation error (CWE-197) in the SIP parser implemented in rust/src/sip/parser.rs. The parser stores SIP request and response body lengths in 16-bit fields, causing truncation for SIP bodies larger than 65,536 bytes. This truncation results in incomplete exposure of the SIP body to inspection mechanisms (frame:request.body and frame:response.body), which can allow content in the truncated portion to evade detection by frame-based rules. The vulnerability is resolved in version 8.0.6.
Potential Impact
The numeric truncation error can lead to incomplete inspection of SIP message bodies larger than 65,536 bytes, allowing potentially malicious content in the truncated portion to evade detection by Suricata's frame-based detection rules. The CVSS score is 3.7 (low severity), indicating limited impact primarily affecting detection capabilities without direct confidentiality, availability, or privilege escalation consequences.
Mitigation Recommendations
Upgrade Suricata to version 8.0.6 or later, where this numeric truncation error in the SIP parser is fixed. No other mitigation is indicated or required.
CVE-2026-63449: CWE-197: Numeric Truncation Error in OISF suricata
Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, the SIP parser in rust/src/sip/parser.rs stores request and response body lengths in 16-bit fields. A SIP body larger than 65,536 bytes can truncate the length and prevent frame:request.body or frame:response.body from exposing the complete body to inspection, allowing content in the omitted portion to evade frame-based detection. This issue is fixed in version 8.0.6.
CVSS v3.1
Score 3.7low
Affected software
OISF
suricata
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Suricata versions >=8.0.0 and <8.0.6 have a numeric truncation error (CWE-197) in the SIP parser implemented in rust/src/sip/parser.rs. The parser stores SIP request and response body lengths in 16-bit fields, causing truncation for SIP bodies larger than 65,536 bytes. This truncation results in incomplete exposure of the SIP body to inspection mechanisms (frame:request.body and frame:response.body), which can allow content in the truncated portion to evade detection by frame-based rules. The vulnerability is resolved in version 8.0.6.
Potential Impact
The numeric truncation error can lead to incomplete inspection of SIP message bodies larger than 65,536 bytes, allowing potentially malicious content in the truncated portion to evade detection by Suricata's frame-based detection rules. The CVSS score is 3.7 (low severity), indicating limited impact primarily affecting detection capabilities without direct confidentiality, availability, or privilege escalation consequences.
Mitigation Recommendations
Upgrade Suricata to version 8.0.6 or later, where this numeric truncation error in the SIP parser is fixed. No other mitigation is indicated or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-16T19:35:57.767Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aad9fc955bf5e2cf583e40b
Added to database: 09/18/2026, 20:32:09 UTC
Last enriched: 09/18/2026, 20:47:10 UTC
Last updated: 09/19/2026, 03:09:04 UTC
Views: 10
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