Bug 2538015 (CVE-2026-94083)
| Summary: | CVE-2026-94083 suricata: suricata: type confusion and invalid free in DoH2 protocol handling | ||
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| Product: | [Other] Security Response | Reporter: | OSIDB Bzimport <bzimport> |
| Component: | vulnerability | Assignee: | Product Security <prodsec-ir-bot> |
| Status: | NEW --- | QA Contact: | |
| Severity: | urgent | Docs Contact: | |
| Priority: | urgent | ||
| Version: | unspecified | Keywords: | Security |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | --- | |
| Doc Text: |
A flaw was found in Suricata's DNS over HTTPS 2 (DoH2) application-layer protocol parser. When processing a DoH2 request accompanied by an HTTP/1 to HTTP/2 upgrade, Suricata mistakenly executes HTTP/2 state cleanup logic while the protocol handler is in an HTTP/1 state. A remote, unauthenticated attacker can exploit this type confusion by sending crafted protocol upgrade traffic to trigger an invalid memory free. This can result in a daemon crash leading to Denial of Service (DoS) or potentially arbitrary code execution within the privileges of the Suricata process. This issue affects Suricata versions prior to 8.0.7 when `app-layer.protocols.doh2` is enabled.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | --- | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 2545210, 2545211 | ||
| Bug Blocks: | |||
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Description
OSIDB Bzimport
2026-09-22 16:36:00 UTC
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