CVE-2026-31932
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedSuricata is a network IDS, IPS and NSM engine. Prior to versions 7.0.15 and 8.0.4, inefficiency in KRB5 buffering can lead to performance degradation. This issue has been patched in versions 7.0.15 and 8.0.4.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThis is a denial-of-service vulnerability in Suricata's KRB5 (Kerberos 5) protocol parsing. Prior to versions 7.0.15 and 8.0.4, inefficient buffering in KRB5 handling causes performance degradation that can be exploited to degrade or exhaust Suricata's processing capabilities when processing Kerberos traffic.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 7.0.15>= 8.0.0, < 8.0.4CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check Suricata versionRun `suricata --version` to identify the installed versionAffected if Version is less than 7.0.15, or greater than or equal to 8.0.0 but less than 8.0.4
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Locate Suricata configuration fileFind the suricata.yaml configuration file, typically in /etc/suricata/ or /usr/local/etc/Affected if Configuration file cannot be located to verify protocol settings
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Verify KRB5 protocol detection is enabledIn suricata.yaml, search for `app-layer` and `protocols` sections; look for `krb5` or `kerberos` entries under enabled protocolsAffected if KRB5/Kerberos 5 protocol detection is enabled in the configuration
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Check if KRB5 traffic is being processedReview Suricata eve.json logs for krb5-related events, or use `suricata --list-app-layer-protocols` to confirm KRB5 is compiled/enabledAffected if Suricata is actively processing or capable of processing Kerberos traffic
User is affected if Suricata version is below 7.0.15 or between 8.0.0 and 8.0.4, AND KRB5 protocol detection is enabled in the configuration with Kerberos traffic present.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped7.0.158.0.4
Upgrade Suricata to version 7.0.15 or 8.0.4 or later. In the interim, consider filtering or rate-limiting KRB5 traffic at network perimeter if possible.
Suricata 7.0.15 (for 7.0.x line) or 8.0.4 (for 8.0.x line)
- Identify your current Suricata version using `suricata --version`
- If running version 7.0.x (below 7.0.15), plan upgrade to version 7.0.15
- If running version 8.0.x (below 8.0.4), plan upgrade to version 8.0.4
- Backup your current Suricata configuration files (typically in /etc/suricata/)
- Stop the Suricata service: `systemctl stop suricata`
- Upgrade Suricata using your package manager (e.g., `apt update && apt install suricata` or `yum update suricata`)
- Verify the new version installed: `suricata --version`
- Restart the Suricata service: `systemctl start suricata`
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-31932 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-31932 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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