Vulnerability-Lookup

GHSA-FMWH-V9R8-W9J6

Vulnerability from github – Published: 2026-03-31 12:31 – Updated: 2026-03-31 12:31

Details

An attacker might be able to trigger a use-after-free by sending crafted DNS queries to a DNSdist using the DNSQuestion:getEDNSOptions method in custom Lua code. In some cases DNSQuestion:getEDNSOptions might refer to a version of the DNS packet that has been modified, thus triggering a use-after-free and potentially a crash resulting in denial of service.

Severity ?

4.8 (Medium)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

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JSON

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  "affected": [],
  "aliases": [
    "CVE-2026-27854"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-31T12:16:28Z",
    "severity": "MODERATE"
  },
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  "id": "GHSA-fmwh-v9r8-w9j6",
  "modified": "2026-03-31T12:31:35Z",
  "published": "2026-03-31T12:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27854"
    },
    {
      "type": "WEB",
      "url": "https://www.dnsdist.org/security-advisories/powerdns-advisory-for-dnsdist-2026-02.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-27854 (GCVE-0-2026-27854)

Vulnerability from cvelistv5 – Published: 2026-03-31 12:06 – Updated: 2026-04-02 13:46

Title

Use after free when parsing EDNS options in Lua

Summary

Severity ?

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L

CWE

Use After Free

Assigner

References

URL

Tags

https://www.dnsdist.org/security-advisories/power…

Impacted products

	Vendor	Product	Version
	PowerDNS	DNSdist	Affected: 1.9.0 , < 1.9.12 (semver) Affected: 2.0.0 , < 2.0.3 (semver)

Date Public ?

2026-03-30 22:00

Credits

Naoki Wakamatsu

Show details on NVD website

JSON

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                "role": "CISA Coordinator",
                "timestamp": "2026-03-31T13:12:37.483504Z",
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Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-FMWH-V9R8-W9J6

CVE-2026-27854 (GCVE-0-2026-27854)

Tags

Sightings

Nomenclature