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CVE-2026-44390

A flaw was found in Unbound. A remote attacker can exploit this vulnerability by sending specially crafted DNS responses containing very large Resource Record Sets (RRsets) that require name compression. This can cause Unbound to spend a significant amount of time processing these responses, leading to degraded performance and potentially a denial of service (DoS) for legitimate users.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:b2d9144bb19856fd4a5a0b5df6e29e2f19d9466fb79b7a036b20a05c3887b645
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
3

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 8 assertions

{"defaultStatus":"unaffected","product":"Unbound","vendor":"NLnet Labs","versions":[{"lessThan":"1.25.1","status":"affected","version":"0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/cna/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"unbound","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.24.2-7.el10_2.2","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/0

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"affected","packageName":"rhcos","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/6

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"affected","packageName":"unbound","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/4

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"affected","packageName":"unbound-main","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1.25.1-2.hum1","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/3

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","packageName":"unbound","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/5

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"unbound","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.24.2-3.el9_8.2","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/2

{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"unbound","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.16.2-5.12.el8_10","versionType":"rpm"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/1
cvss · 2 assertions

{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Amber","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"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"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/metrics/1/cvssV3_1
cwe · 2 assertions

{"cweId":"CWE-407","description":"CWE-407: Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-1050","description":"Excessive Platform Resource Consumption within a Loop","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/problemTypes/0/descriptions/0

Affected products and versions

8 source assertions
{"defaultStatus":"unaffected","product":"Unbound","vendor":"NLnet Labs","versions":[{"lessThan":"1.25.1","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/cna/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"],"defaultStatus":"affected","packageName":"unbound","product":"Red Hat Enterprise Linux 10","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.24.2-7.el10_2.2","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/0
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"],"defaultStatus":"affected","packageName":"rhcos","product":"Red Hat OpenShift Container Platform 4","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/6
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"],"defaultStatus":"affected","packageName":"unbound","product":"Red Hat Enterprise Linux 6","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/4
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:hummingbird:1"],"defaultStatus":"affected","packageName":"unbound-main","product":"Red Hat Hardened Images","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"1.25.1-2.hum1","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/3
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"],"defaultStatus":"affected","packageName":"unbound","product":"Red Hat Enterprise Linux 7","vendor":"Red Hat"}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/5
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9"],"defaultStatus":"affected","packageName":"unbound","product":"Red Hat Enterprise Linux 9","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.24.2-3.el9_8.2","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/2
{"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8"],"defaultStatus":"affected","packageName":"unbound","product":"Red Hat Enterprise Linux 8","vendor":"Red Hat","versions":[{"lessThan":"*","status":"unaffected","version":"0:1.16.2-5.12.el8_10","versionType":"rpm"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/affected/1

Provider-owned CVSS observations

2 source assertions
{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/U:Amber","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"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"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/metrics/1/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-407","description":"CWE-407: Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-1050","description":"Excessive Platform Resource Consumption within a Loop","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/problemTypes/0/descriptions/0

Source references

8 source assertions
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:24013"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/references/6
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:36320"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/references/3
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:36777"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/references/5
{"tags":["vendor-advisory","x_refsource_REDHAT"],"url":"https://access.redhat.com/errata/RHSA-2026:37282"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/references/4
{"tags":["vdb-entry","x_refsource_REDHAT"],"url":"https://access.redhat.com/security/cve/CVE-2026-44390"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/references/0
{"name":"RHBZ#2480130","tags":["issue-tracking","x_refsource_REDHAT"],"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2480130"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/references/1
{"tags":["x_sadp-csaf-vex"],"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44390.json"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/adp/1/references/2
{"tags":["vendor-advisory"],"url":"https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-44390.txt"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:337e8b58ffe0fdec707ca30319028e6a660b8d1846dc43320332984b7b4f2a44 · sha256:2a7a7b854a584d63… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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