CVE-2026-94084: CWE-416 Use After Free in OISF Suricata
CVE-2026-94084 is a critical use-after-free vulnerability in Suricata before version 8.0.7. It occurs in the Http2ThreadMultiBuf component when inspecting HTTP/2 transactions with rules that use http.response_header both with and without a transform. This flaw can lead to high impact on confidentiality and integrity, with a lower impact on availability.
AI Analysis
Technical Summary
Suricata versions prior to 8.0.7 contain a use-after-free vulnerability (CWE-416) in the Http2ThreadMultiBuf code path. This vulnerability is triggered when a transaction is inspected by rules that use the http.response_header keyword with and without a transform, causing memory to be freed prematurely and potentially leading to memory corruption. The CVSS 3.1 score is 9.4 (critical), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and high confidentiality and integrity impact with low availability impact.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code or cause a denial of service due to memory corruption. The confidentiality and integrity of the system could be severely compromised, while availability impact is low. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available in Suricata version 8.0.7. Users should upgrade to version 8.0.7 or later to remediate this vulnerability. No other mitigation guidance is provided or required.
CVE-2026-94084: CWE-416 Use After Free in OISF Suricata
Description
CVE-2026-94084 is a critical use-after-free vulnerability in Suricata before version 8.0.7. It occurs in the Http2ThreadMultiBuf component when inspecting HTTP/2 transactions with rules that use http.response_header both with and without a transform. This flaw can lead to high impact on confidentiality and integrity, with a lower impact on availability.
CVSS v3.1
Score 9.4critical
Affected software
OISF
Suricata
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Suricata versions prior to 8.0.7 contain a use-after-free vulnerability (CWE-416) in the Http2ThreadMultiBuf code path. This vulnerability is triggered when a transaction is inspected by rules that use the http.response_header keyword with and without a transform, causing memory to be freed prematurely and potentially leading to memory corruption. The CVSS 3.1 score is 9.4 (critical), reflecting network attack vector, low attack complexity, no privileges or user interaction required, and high confidentiality and integrity impact with low availability impact.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code or cause a denial of service due to memory corruption. The confidentiality and integrity of the system could be severely compromised, while availability impact is low. There are no known exploits in the wild at this time.
Mitigation Recommendations
A fix is available in Suricata version 8.0.7. Users should upgrade to version 8.0.7 or later to remediate this vulnerability. No other mitigation guidance is provided or required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-09-20T01:20:20.153Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aaf379b55bf5e2cf55c7be7
Added to database: 09/20/2026, 01:32:11 UTC
Last enriched: 09/20/2026, 01:46:31 UTC
Last updated: 09/20/2026, 03:37:00 UTC
Views: 25
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