{ "document": { "aggregate_severity": { "text": "Medium" }, "category": "csaf_vex", "csaf_version": "2.0", "distribution": { "text": "TuxCare License Agreement", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://tuxcare.com/contact/", "name": "TuxCare", "namespace": "https://tuxcare.com/" }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://security.tuxcare.com/csaf/v2/els_os/centos-stream8els/vex/2026/cve-2026-32792-els_os-centos-stream8els.json" } ], "tracking": { "current_release_date": "2026-05-27T18:26:09Z", "generator": { "date": "2026-05-27T18:26:09Z", "engine": { "name": "pyCSAF" } }, "id": "CVE-2026-32792-ELS_OS-CENTOS-STREAM8ELS", "initial_release_date": "2026-05-20T10:16:00Z", "revision_history": [ { "date": "2026-05-20T10:16:00Z", "number": "1", "summary": "Initial version" }, { "date": "2026-05-27T14:34:59Z", "number": "2", "summary": "Official Publication" }, { "date": "2026-05-27T18:26:09Z", "number": "3", 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"relates_to_product_reference": "CentOS-Stream-8" }, { "category": "default_component_of", "full_product_name": { "name": "unbound-0:1.16.2-5.el8.x86_64 as a component of Community Enterprise Operating System 8", "product_id": "CentOS-Stream-8:unbound-0:1.16.2-5.el8.x86_64" }, "product_reference": "unbound-0:1.16.2-5.el8.x86_64", "relates_to_product_reference": "CentOS-Stream-8" }, { "category": "default_component_of", "full_product_name": { "name": "unbound-devel-0:1.16.2-5.el8.i686 as a component of Community Enterprise Operating System 8", "product_id": "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.i686" }, "product_reference": "unbound-devel-0:1.16.2-5.el8.i686", "relates_to_product_reference": "CentOS-Stream-8" }, { "category": "default_component_of", "full_product_name": { "name": "unbound-devel-0:1.16.2-5.el8.x86_64 as a component of Community Enterprise Operating System 8", "product_id": "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.x86_64" }, "product_reference": "unbound-devel-0:1.16.2-5.el8.x86_64", "relates_to_product_reference": "CentOS-Stream-8" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-32792", "cwe": { "id": "CWE-125", "name": "Out-of-bounds Read" }, "notes": [ { "category": "description", "text": "NLnet Labs Unbound 1.6.2 up to and including version 1.25.0 has a denial of service vulnerability when compiled with DNSCrypt support ('--enable-dnscrypt'). A bad DNSCrypt query could underflow Unbound's DNSCrypt packet reading procedure that may lead to heap overflow. A malicious actor can exploit the vulnerability with a single bad DNSCrypt query that its decrypted plaintext consists entirely of '0x00' bytes and does not contain the expected '0x80' marker. Unbound would then start reading more bytes than necessary until it finds a non-'0x00' byte. Based on the underlying memory allocator and the memory layout, it could lead to heap overflow while reading followed by a crash. Likelihood of a crash is low, since it relies heavily on the underlying memory allocator and the memory layout. If the heap overflow does not happen, Unbound's later packet checks will deny the packet. Unbound 1.25.1 contains a patch with a fix to bound reading in the given buffer space.", "title": "Vulnerability description" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "known_affected": [ "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els2.x86_64", "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els3.x86_64", "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els4.x86_64", "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els5.x86_64", "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els2.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els3.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els4.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els5.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.x86_64", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.i686", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els1.i686", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els2.i686", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els2.x86_64", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els3.i686", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els3.x86_64", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els4.i686", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els4.x86_64", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els5.i686", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.tuxcare.els5.x86_64", "CentOS-Stream-8:unbound-devel-0:1.16.2-5.el8.x86_64", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.i686", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els1.i686", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els2.i686", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els2.x86_64", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els3.i686", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els3.x86_64", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els4.i686", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els4.x86_64", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els5.i686", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.tuxcare.els5.x86_64", "CentOS-Stream-8:unbound-libs-0:1.16.2-5.el8.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://cve.tuxcare.com/els/cve/CVE-2026-32792" }, { "category": "external", "summary": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-32792.txt", "url": "https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-32792.txt" } ], "release_date": "2026-05-20T10:16:00Z", "remediations": [ { "category": "no_fix_planned", "date": "2026-05-27T18:01:31.543924Z", "details": "This flaw is only reachable in Unbound builds compiled with the non-default --enable-dnscrypt option and with a DNSCrypt listener explicitly enabled (dnscrypt-enable set to yes and a dnscrypt-port/interface configured); standard resolver configurations that do not expose DNSCrypt are unaffected. Even when reachable, it is availability-only: triggering a crash depends on allocator and memory layout, and otherwise the malformed packet is rejected with no confidentiality or integrity impact. Given the compile-time and runtime prerequisites plus the low, DoS-only effect, this can be safely deprioritized for centrally managed VM/server deployments that do not intentionally run Unbound as a DNSCrypt server.", "product_ids": [ "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els2.x86_64", "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els3.x86_64", "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els4.x86_64", "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.tuxcare.els5.x86_64", "CentOS-Stream-8:python3-unbound-0:1.16.2-5.el8.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els1.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els2.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els3.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els4.x86_64", "CentOS-Stream-8:unbound-0:1.16.2-5.el8.tuxcare.els5.x86_64", 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