CVE-2026-3104 | ISC BIND prior 9.20.21/9.21.20 Domain release of resource

VDB-353134 · CVE-2026-3104 · GCVE-0-2026-3104 ISC BIND PRIOR 9.20.21/9.21.20 DOMAIN RELEASE OF RESOURCE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.3 $0-$5k 2.23+ Summaryinfo A vulnerability described as problematic has been identified in ISC BIND up to 9.18.45/9.18.46-S0/9.20.20/9.20.20-S1/9.21.19. Affected by this issue is some unknown functionality of the component Domain Handler. Executing a manipulation can lead to release of resource. The identification of this vulnerability is CVE-2026-3104. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is recommended. Detailsinfo A vulnerability classified as problematic was found in ISC BIND up to 9.18.45/9.18.46-S0/9.20.20/9.20.20-S1/9.21.19. This vulnerability affects an unknown code block of the component Domain Handler. The manipulation with an unknown input leads to a release of resource vulnerability. The CWE definition for the vulnerability is CWE-772. The product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed. As an impact it is known to affect availability. CVE summarizes: A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected. The advisory is available at kb.isc.org. This vulnerability was named CVE-2026-3104 since 02/24/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 03/25/2026). This vulnerability is assigned to T1499 by the MITRE ATT&CK project. Upgrading to version 9.20.21 or 9.21.20 eliminates this vulnerability. Productinfo Type Domain Name Software Vendor ISC Name BIND Version 9.18.0 9.18.1 9.18.2 9.18.3 9.18.4 9.18.5 9.18.6 9.18.7 9.18.8 9.18.9 9.18.10 9.18.11 9.18.12 9.18.13 9.18.14 9.18.15 9.18.16 9.18.17 9.18.18 9.18.19 9.18.20 9.18.21 9.18.22 9.18.23 9.18.24 9.18.25 9.18.26 9.18.27 9.18.28 9.18.29 9.18.30 9.18.31 9.18.32 9.18.33 9.18.34 9.18.35 9.18.36 9.18.37 9.18.38 9.18.39 9.18.40 9.18.41 9.18.42 9.18.43 9.18.44 9.18.45 9.18.46-S0 9.20.0 9.20.1 9.20.2 9.20.3 9.20.4 9.20.5 9.20.6 9.20.7 9.20.8 9.20.9 9.20.10 9.20.11 9.20.12 9.20.13 9.20.14 9.20.15 9.20.16 9.20.17 9.20.18 9.20.19 9.20.20 9.20.20-S1 9.21.0 9.21.1 9.21.2 9.21.3 9.21.4 9.21.5 9.21.6 9.21.7 9.21.8 9.21.9 9.21.10 9.21.11 9.21.12 9.21.13 9.21.14 9.21.15 9.21.16 9.21.17 9.21.18 9.21.19 License open-source Website Vendor: https://www.isc.org/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.4 VulDB Meta Temp Score: 6.3 VulDB Base Score: 5.3 VulDB Temp Score: 5.1 VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA Base Score: 7.5 CNA Vector (isc): 🔒 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Release of resource CWE: CWE-772 / CWE-400 / CWE-404 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: BIND 9.20.21/9.21.20 Timelineinfo 02/24/2026 CVE reserved 03/25/2026 +29 days Advisory disclosed 03/25/2026 +0 days VulDB entry created 03/25/2026 +0 days VulDB entry last update Sourcesinfo Vendor: isc.org Advisory: kb.isc.org Status: Confirmed CVE: CVE-2026-3104 (🔒) GCVE (CVE): GCVE-0-2026-3104 GCVE (VulDB): GCVE-100-353134 Entryinfo Created: 03/25/2026 15:20 Changes: 03/25/2026 15:20 (64) Complete: 🔍 Cache ID: 99:9DC:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸