{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-12244 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-12244 is a high-severity vulnerability in NLnet Labs NSD, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-12244 and fix it if it is affected.\n\nWhat it is: CVE-2026-12244 is a high-severity vulnerability in NLnet Labs NSD, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-12244 in the wild and no public exploit code.\n\nAffected product: NLnet Labs NSD. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-12244/ (Markdown: https://insights.sbomify.com/CVE-2026-12244/index.md)","id":"CVE-2026-12244","markdown":"https://insights.sbomify.com/CVE-2026-12244/index.md","name":"CVE-2026-12244","record":{"aliases":["ALPINE-CVE-2026-12244","DEBIAN-CVE-2026-12244","GHSA-p22w-wq6p-g85g"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":true,"product_category":"NSD DNS server","requires_auth":"low_privilege","summary":"A secondary NSD server can be crashed or subjected to remote code execution by a malicious primary zone via a crafted SVCB record causing an integer overflow.","user_interaction":"not_required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"NLnet Labs","cpe":[{"product":"nsd","vendor":"nlnetlabs"}],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-190","name":"Integer Overflow or Wraparound"},{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"If NSD is configured as secondary for a zone, the primary of that zone can crash NSD with an AXFR containing a DNS message with a special crafted SVCB RR with an rdata size of 65512, that let's an (uint16_t) variable that is used to allocate space needed for the RR wrap (because total size \u003e 65535), causing a heap overflow. The attacker can perform a controlled (RCE class) head write of up to 65509 bytes","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Heap overflow and crash with crafted SVCB RR","id":"CVE-2026-12244","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"integer_overflow","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of DNS over TLS service by any DoT client","id":"CVE-2026-12245"},"packages":[],"prev":{"headline":"nltk: Arbitrary File Read via Path Traversal in nltk.data.load() through Percent-Encoded Sequences","id":"CVE-2026-12243"},"products":["NSD"],"published":"2026-06-25","related":[{"cvss_score":8.7,"headline":"Denial of DNS over TLS service by any DoT client","id":"CVE-2026-12245","kev_date_added":null,"published":"2026-06-25"},{"cvss_score":8.2,"headline":"Wrong interpretation of ACL ranges","id":"CVE-2026-18664","kev_date_added":null,"published":"2026-08-26"},{"cvss_score":8.2,"headline":"Remote UDP DoS by sending multiple DNS Cookie options","id":"CVE-2026-19401","kev_date_added":null,"published":"2026-08-26"},{"cvss_score":8.2,"headline":"Bypass of BLOCKED ACL items on proxy protocol port over TCP or TLS","id":"CVE-2026-19538","kev_date_added":null,"published":"2026-08-26"},{"cvss_score":8.2,"headline":"Bypass of client certificate verification with transfer over TLS","id":"CVE-2026-12490","kev_date_added":null,"published":"2026-06-25"},{"cvss_score":7.5,"headline":"Denial of service in n/a","id":"CVE-2016-6173","kev_date_added":null,"published":"2017-02-09"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-25","vendors":["NLnet Labs"]},"summary":"A secondary NSD server can be crashed or subjected to remote code execution by a malicious primary zone via a crafted SVCB record causing an integer overflow.","url":"https://insights.sbomify.com/CVE-2026-12244/"}