CVE-2026-31932 (GCVE-0-2026-31932)

Vulnerability from cvelistv5 – Published: 2026-04-02 14:02 – Updated: 2026-04-02 18:33
VLAI
Title
Suricata krb5: quadratic complexity in krb5 buffering
Summary
Suricata 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.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
Impacted products
Vendor Product Version
OISF suricata Affected: < 7.0.15
Affected: >= 8.0.0, < 8.0.4
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-31932",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-02T18:33:08.564205Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-02T18:33:25.016Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "suricata",
          "vendor": "OISF",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 7.0.15"
            },
            {
              "status": "affected",
              "version": "\u003e= 8.0.0, \u003c 8.0.4"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Suricata 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-407",
              "description": "CWE-407: Inefficient Algorithmic Complexity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-02T14:02:40.205Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/OISF/suricata/security/advisories/GHSA-rp9m-jcpw-hggr",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/OISF/suricata/security/advisories/GHSA-rp9m-jcpw-hggr"
        },
        {
          "name": "https://redmine.openinfosecfoundation.org/issues/8305",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://redmine.openinfosecfoundation.org/issues/8305"
        }
      ],
      "source": {
        "advisory": "GHSA-rp9m-jcpw-hggr",
        "discovery": "UNKNOWN"
      },
      "title": "Suricata krb5: quadratic complexity in krb5 buffering"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-31932",
    "datePublished": "2026-04-02T14:02:40.205Z",
    "dateReserved": "2026-03-10T15:10:10.654Z",
    "dateUpdated": "2026-04-02T18:33:25.016Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-31932",
      "date": "2026-07-14",
      "epss": "0.00267",
      "percentile": "0.18406"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31932\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-04-02T14:16:28.763\",\"lastModified\":\"2026-06-17T10:34:47.947\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Suricata 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.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"OISF\",\"product\":\"suricata\",\"versions\":[{\"version\":\"\u003c 7.0.15\",\"status\":\"affected\"},{\"version\":\"\u003e= 8.0.0, \u003c 8.0.4\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-04-02T18:33:08.564205Z\",\"id\":\"CVE-2026-31932\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-407\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"7.0.15\",\"matchCriteriaId\":\"1E0D4CF4-11E0-4FB1-9C17-F38257D376ED\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.0.0\",\"versionEndExcluding\":\"8.0.4\",\"matchCriteriaId\":\"F35C5A48-CA30-43B3-9E53-D3E51C862604\"}]}]}],\"references\":[{\"url\":\"https://github.com/OISF/suricata/security/advisories/GHSA-rp9m-jcpw-hggr\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://redmine.openinfosecfoundation.org/issues/8305\",\"source\":\"security-advisories@github.com\",\"tags\":[\"Issue Tracking\",\"Permissions Required\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-06-28T07:28:22+00:00",
      "cve": "CVE-2026-31932",
      "id": "CVE-2026-31932",
      "initial_release_date": "2026-04-02T14:02:40.205000+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Suricata: Suricata: Denial of Service due to inefficiency in KRB5 buffering",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31932.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"cna\": {\"title\": \"Suricata krb5: quadratic complexity in krb5 buffering\", \"problemTypes\": [{\"descriptions\": [{\"cweId\": \"CWE-407\", \"lang\": \"en\", \"description\": \"CWE-407: Inefficient Algorithmic Complexity\", \"type\": \"CWE\"}]}], \"metrics\": [{\"cvssV3_1\": {\"attackComplexity\": \"LOW\", \"attackVector\": \"NETWORK\", \"availabilityImpact\": \"HIGH\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"scope\": \"UNCHANGED\", \"userInteraction\": \"NONE\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"version\": \"3.1\"}}], \"references\": [{\"name\": \"https://github.com/OISF/suricata/security/advisories/GHSA-rp9m-jcpw-hggr\", \"tags\": [\"x_refsource_CONFIRM\"], \"url\": \"https://github.com/OISF/suricata/security/advisories/GHSA-rp9m-jcpw-hggr\"}, {\"name\": \"https://redmine.openinfosecfoundation.org/issues/8305\", \"tags\": [\"x_refsource_MISC\"], \"url\": \"https://redmine.openinfosecfoundation.org/issues/8305\"}], \"affected\": [{\"vendor\": \"OISF\", \"product\": \"suricata\", \"versions\": [{\"version\": \"\u003c 7.0.15\", \"status\": \"affected\"}, {\"version\": \"\u003e= 8.0.0, \u003c 8.0.4\", \"status\": \"affected\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-04-02T14:02:40.205Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Suricata 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.\"}], \"source\": {\"advisory\": \"GHSA-rp9m-jcpw-hggr\", \"discovery\": \"UNKNOWN\"}}, \"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-31932\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-04-02T18:33:08.564205Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-04-02T18:33:14.922Z\"}}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-31932\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"GitHub_M\", \"dateReserved\": \"2026-03-10T15:10:10.654Z\", \"datePublished\": \"2026-04-02T14:02:40.205Z\", \"dateUpdated\": \"2026-04-02T18:33:25.016Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.