CVE-2026-97313

validating

GHSA-9p2q-wv22-f9q8 ↗EUVD-2026-107256 ↗

no check availablenot proven exploitable

cve.orgpublic pockev

ISC BIND 9 >= 9.16.0, <= 9.18.50; >= 9.20.0, <= 9.20.29; >= 9.21.0, <= 9.21.26; >= 9.11.3-S1, <= 9.18.50-S1; >= 9.20.9-S1, <= 9.20.29-S1

CWE-617 Reachable Assertion

ETK-2026-2326, permanent identifier

cvss7.5cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

1mrunning

evidencecurrent stage

timeline

0 = trigger signal

trigger signal (cve.org) +0hvalidating

+1h

+2h

+3h

+4h

description

Affected BIND 9 releases can terminate unexpectedly when handling certain DNS query traffic. An attacker may deny DNS service if recursive queries are allowed and the server uses at least two RPZ zones with different recursive-only settings.

Still under analysis: more detail becomes available as the pipeline runs.

mitigation

Restrict recursive-query access to trusted clients and avoid mixed recursive-only settings across RPZ zones. Monitor vendor updates and upgrade when a fixed release is published.

check

building now

exploit

not yet

automation

–

auth required

EPSS

–

agent run time

cve.org record, t = 0

2026-10-21 12:47Z

Δ to public poc

–

Δ to kev

–

outcome

Run in progress: no artifact yet.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

2026-10-21 12:47Z
cve_org: trigger signal, started the run
https://www.cve.org/CVERecord?id=CVE-2026-97313

this entry in the feed

GET /api/v1/feed/CVE-2026-97313

{
  "etk_id": "ETK-2026-2326",
  "cve_id": "CVE-2026-97313",
  "display_id": "CVE-2026-97313",
  "ghsa_id": "GHSA-9p2q-wv22-f9q8",
  "euvd_id": "EUVD-2026-107256",
  "status": "in_pipeline",
  "anchor_state": "anchored",
  "title": "Denial of service in ISC BIND 9 RPZ handling",
  "summary": "Affected BIND 9 releases can terminate unexpectedly when handling certain DNS query traffic. An attacker may deny DNS service if recursive queries are allowed and the server uses at least two RPZ zones with different `recursive-only` settings.",
  "mitigation": "Restrict recursive-query access to trusted clients and avoid mixed `recursive-only` settings across RPZ zones. Monitor vendor updates and upgrade when a fixed release is published.",
  "vendor": "ISC",
  "product": "BIND 9",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 9.16.0, <= 9.18.50",
        ">= 9.20.0, <= 9.20.29",
        ">= 9.21.0, <= 9.21.26",
        ">= 9.11.3-S1, <= 9.18.50-S1",
        ">= 9.20.9-S1, <= 9.20.29-S1"
      ],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "BIND 9",
      "purl": null
    }
  ],
  "cwes": [
    617
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 45.517722733333336,
  "t0_at": "2026-10-21T12:47:28.499000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-10-21T12:47:28.499000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-21T12:47:28.499000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-97313"
    }
  }
}

published 2026-10-21 14:43Z
last change 2026-10-21 16:24Z

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