CVE-2026-41292 (GCVE-0-2026-41292)

Vulnerability from cvelistv5 – Published: 2026-05-20 09:19 – Updated: 2026-06-30 12:08
VLAI
Title
Long list of incoming EDNS options degrades performance
Summary
NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100).
Severity
6.6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Red
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
  • CWE-770 - Allocation of Resources Without Limits or Throttling
  • CWE-1050 - Excessive Platform Resource Consumption within a Loop
Assigner
References
Impacted products
Vendor Product Version
NLnet Labs Unbound Affected: 0 , < 1.25.1 (semver)
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
 Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
 Create a notification for this product.
Red Hat Red Hat Hardened Images     cpe:/a:redhat:hummingbird:1
 Create a notification for this product.
Red Hat Red Hat OpenShift Container Platform 4     cpe:/a:redhat:openshift:4
 Create a notification for this product.
Red Hat Red Hat OpenStack Platform 16.2     cpe:/a:redhat:openstack:16.2
 Create a notification for this product.
Red Hat Red Hat OpenStack Platform 17.1     cpe:/a:redhat:openstack:17.1
 Create a notification for this product.
Red Hat Red Hat OpenStack Platform 18.0     cpe:/a:redhat:openstack:18.0
 Create a notification for this product.
Red Hat Red Hat Data Grid 8     cpe:/a:redhat:jboss_data_grid:8
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack     cpe:/a:redhat:jbosseapxp
 Create a notification for this product.
Date Public
2026-05-20 00:00
Credits
GitHub user N0zoM1z0 Qifan Zhang (Palo Alto Networks)
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-41292",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-20T12:11:12.511786Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-20T12:11:23.425Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:6"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 6",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:8"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:hummingbird:1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Hardened Images",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift:4"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Container Platform 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openstack:16.2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenStack Platform 16.2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openstack:17.1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenStack Platform 17.1",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openstack:18.0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenStack Platform 18.0",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_data_grid:8"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Data Grid 8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jbosseapxp"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat JBoss Enterprise Application Platform Expansion Pack",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-05-20T09:19:13.022Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in Unbound. A remote attacker can exploit this vulnerability by sending queries with an excessive number of EDNS (Extension Mechanisms for DNS) options. This can cause Unbound threads to be held hostage while parsing and creating internal data structures for these options. Coordinated attacks can lead to resource exhaustion, resulting in a degradation of service or a denial of service (DoS) for legitimate users."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "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"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-1050",
                "description": "Excessive Platform Resource Consumption within a Loop",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-30T12:08:48.358Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-41292"
          },
          {
            "name": "RHBZ#2480125",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480125"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41292.json"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-05-20T10:00:54.433Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-05-20T09:19:13.022Z",
            "value": "Made public."
          }
        ],
        "title": "unbound: Unbound: Denial of Service via excessive EDNS options",
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Unbound",
          "vendor": "NLnet Labs",
          "versions": [
            {
              "lessThan": "1.25.1",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "GitHub user N0zoM1z0"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Qifan Zhang (Palo Alto Networks)"
        }
      ],
      "datePublic": "2026-05-20T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100)."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 6.6,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Red",
            "version": "4.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-407",
              "description": "CWE-407: Inefficient Algorithmic Complexity",
              "lang": "en",
              "type": "CWE"
            },
            {
              "cweId": "CWE-770",
              "description": "CWE-770: Allocation of Resources Without Limits or Throttling",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-20T09:19:13.022Z",
        "orgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6",
        "shortName": "NLnet Labs"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-41292.txt"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "This issue is fixed starting with version 1.25.1"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-01-11T00:00:00.000Z",
          "value": "Issue reported by N0zoM1z0"
        },
        {
          "lang": "en",
          "time": "2026-01-12T00:00:00.000Z",
          "value": "NLnet Labs shares patch"
        },
        {
          "lang": "en",
          "time": "2026-01-13T00:00:00.000Z",
          "value": "N0zoM1z0 verifies patch"
        },
        {
          "lang": "en",
          "time": "2026-04-26T00:00:00.000Z",
          "value": "Issue also reported by Qifan Zhang"
        },
        {
          "lang": "en",
          "time": "2026-04-28T00:00:00.000Z",
          "value": "NLnet Labs shares same patch"
        },
        {
          "lang": "en",
          "time": "2026-04-29T00:00:00.000Z",
          "value": "Qifan Zhang verifies patch"
        },
        {
          "lang": "en",
          "time": "2026-05-20T00:00:00.000Z",
          "value": "Fixes released with version 1.25.1"
        }
      ],
      "title": "Long list of incoming EDNS options degrades performance",
      "x_generator": {
        "engine": "cvelib 1.8.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "206fc3a0-e175-490b-9eaa-a5738056c9f6",
    "assignerShortName": "NLnet Labs",
    "cveId": "CVE-2026-41292",
    "datePublished": "2026-05-20T09:19:13.022Z",
    "dateReserved": "2026-05-07T10:13:43.992Z",
    "dateUpdated": "2026-06-30T12:08:48.358Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-41292",
      "date": "2026-07-05",
      "epss": "0.00556",
      "percentile": "0.42344"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-41292\",\"sourceIdentifier\":\"sep@nlnetlabs.nl\",\"published\":\"2026-05-20T10:16:27.327\",\"lastModified\":\"2026-06-30T03:19:25.680\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100).\"}],\"affected\":[{\"source\":\"sep@nlnetlabs.nl\",\"affectedData\":[{\"vendor\":\"NLnet Labs\",\"product\":\"Unbound\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"1.25.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 10\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:10\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 6\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:6\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 7\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 8\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Enterprise Linux 9\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/o:redhat:enterprise_linux:9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Hardened Images\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:hummingbird:1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenShift Container Platform 4\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openshift:4\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenStack Platform 16.2\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openstack:16.2\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenStack Platform 17.1\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openstack:17.1\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat OpenStack Platform 18.0\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:openstack:18.0\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Data Grid 8\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:jboss_data_grid:8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss Enterprise Application Platform Expansion Pack\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:jbosseapxp\"]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"sep@nlnetlabs.nl\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"vectorString\":\"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Red\",\"baseScore\":6.6,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"NONE\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"NONE\",\"vulnIntegrityImpact\":\"NONE\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"NONE\",\"subIntegrityImpact\":\"NONE\",\"subAvailabilityImpact\":\"NONE\",\"exploitMaturity\":\"UNREPORTED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"RED\"}}],\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"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},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"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\":\"2026-05-20T12:11:12.511786Z\",\"id\":\"CVE-2026-41292\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"sep@nlnetlabs.nl\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-407\"},{\"lang\":\"en\",\"value\":\"CWE-770\"}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-1050\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"1.25.1\",\"matchCriteriaId\":\"45EC9AEF-23EC-4ECC-A769-18DF07B2CAEC\"}]}]}],\"references\":[{\"url\":\"https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-41292.txt\",\"source\":\"sep@nlnetlabs.nl\",\"tags\":[\"Mitigation\",\"Vendor Advisory\"]},{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-41292\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2480125\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41292.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"unbound: Unbound: Denial of Service via excessive EDNS options\", \"metrics\": [{\"other\": {\"type\": \"Red Hat severity rating\", \"content\": {\"value\": \"Important\", \"namespace\": \"https://access.redhat.com/security/updates/classification/\"}}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"cpes\": [\"cpe:/o:redhat:enterprise_linux:10\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 10\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:6\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 6\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 7\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:hummingbird:1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Hardened Images\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openstack:16.2\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenStack Platform 16.2\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openstack:17.1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenStack Platform 17.1\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openstack:18.0\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenStack Platform 18.0\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:jboss_data_grid:8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Data Grid 8\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:jbosseapxp\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat JBoss Enterprise Application Platform Expansion Pack\", \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-05-20T10:00:54.433Z\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-05-20T09:19:13.022Z\", \"value\": \"Made public.\"}], \"x_adpType\": \"supplier\", \"datePublic\": \"2026-05-20T09:19:13.022Z\", \"references\": [{\"url\": \"https://access.redhat.com/security/cve/CVE-2026-41292\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2480125\", \"name\": \"RHBZ#2480125\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41292.json\", \"tags\": [\"x_sadp-csaf-vex\"]}], \"x_generator\": {\"engine\": \"sadp-cli 1.0.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in Unbound. A remote attacker can exploit this vulnerability by sending queries with an excessive number of EDNS (Extension Mechanisms for DNS) options. This can cause Unbound threads to be held hostage while parsing and creating internal data structures for these options. Coordinated attacks can lead to resource exhaustion, resulting in a degradation of service or a denial of service (DoS) for legitimate users.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-1050\", \"description\": \"Excessive Platform Resource Consumption within a Loop\"}]}], \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-06-30T12:08:48.358Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-41292\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-20T12:11:12.511786Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-20T12:11:18.415Z\"}}], \"cna\": {\"title\": \"Long list of incoming EDNS options degrades performance\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"GitHub user N0zoM1z0\"}, {\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Qifan Zhang (Palo Alto Networks)\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 6.6, \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Red\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"NLnet Labs\", \"product\": \"Unbound\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"1.25.1\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-01-11T00:00:00.000Z\", \"value\": \"Issue reported by N0zoM1z0\"}, {\"lang\": \"en\", \"time\": \"2026-01-12T00:00:00.000Z\", \"value\": \"NLnet Labs shares patch\"}, {\"lang\": \"en\", \"time\": \"2026-01-13T00:00:00.000Z\", \"value\": \"N0zoM1z0 verifies patch\"}, {\"lang\": \"en\", \"time\": \"2026-04-26T00:00:00.000Z\", \"value\": \"Issue also reported by Qifan Zhang\"}, {\"lang\": \"en\", \"time\": \"2026-04-28T00:00:00.000Z\", \"value\": \"NLnet Labs shares same patch\"}, {\"lang\": \"en\", \"time\": \"2026-04-29T00:00:00.000Z\", \"value\": \"Qifan Zhang verifies patch\"}, {\"lang\": \"en\", \"time\": \"2026-05-20T00:00:00.000Z\", \"value\": \"Fixes released with version 1.25.1\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"This issue is fixed starting with version 1.25.1\"}], \"datePublic\": \"2026-05-20T00:00:00.000Z\", \"references\": [{\"url\": \"https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-41292.txt\", \"tags\": [\"vendor-advisory\"]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100).\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-407\", \"description\": \"CWE-407: Inefficient Algorithmic Complexity\"}, {\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-770\", \"description\": \"CWE-770: Allocation of Resources Without Limits or Throttling\"}]}], \"providerMetadata\": {\"orgId\": \"206fc3a0-e175-490b-9eaa-a5738056c9f6\", \"shortName\": \"NLnet Labs\", \"dateUpdated\": \"2026-05-20T09:19:13.022Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-41292\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-06-30T12:08:48.358Z\", \"dateReserved\": \"2026-05-07T10:13:43.992Z\", \"assignerOrgId\": \"206fc3a0-e175-490b-9eaa-a5738056c9f6\", \"datePublished\": \"2026-05-20T09:19:13.022Z\", \"assignerShortName\": \"NLnet Labs\"}",
      "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.