{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-23555 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-23555 is a high-severity denial of service vulnerability in Xen Xen, published on 23 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-23555 and fix it if it is affected.\n\nWhat it is: CVE-2026-23555 is a high-severity denial of service vulnerability in Xen Xen, published on 23 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-23555 in the wild and no public exploit code.\n\nAffected product: Xen Xen. 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-2026-23555/ (Markdown: https://insights.sbomify.com/CVE-2026-23555/index.md)","id":"CVE-2026-23555","markdown":"https://insights.sbomify.com/CVE-2026-23555/index.md","name":"CVE-2026-23555","record":{"aliases":["ALPINE-CVE-2026-23555","DEBIAN-CVE-2026-23555","GHSA-hv7f-mhvh-6mf6","UBUNTU-CVE-2026-23555"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Xen hypervisor","requires_auth":"none","summary":"An unprivileged guest can crash the Xenstore daemon or cause high CPU usage by accessing an illegal node path, impacting service availability.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"XEN","cpe":[{"product":"xen","vendor":"xen"}],"cvss":{"score":7.1,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-617","name":"Reachable Assertion"}],"description":"Any guest issuing a Xenstore command accessing a node using the\n(illegal) node path \"/local/domain/\", will crash xenstored due to a\nclobbered error indicator in xenstored when verifying the node path.\n\nNote that the crash is forced via a failing assert() statement in\nxenstored. In case xenstored is being built with NDEBUG #defined,\nan unprivileged guest trying to access the node path \"/local/domain/\"\nwill result in it no longer being serviced by xenstored, other guests\n(including dom0) will still be serviced, but xenstored will use up\nall cpu time it can get.","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":"Xenstored DoS by unprivileged domain","id":"CVE-2026-23555","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"xen:xen","products":["xen:xen"],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"oxenstored keeps quota related use counts across domain destruction","id":"CVE-2026-23556"},"packages":[],"prev":{"headline":"Use after free of paging structures in EPT","id":"CVE-2026-23554"},"products":["Xen"],"published":"2026-03-23","related":[{"cvss_score":10,"headline":"Privilege escalation in n/a","id":"CVE-2017-10912","kev_date_added":null,"published":"2017-07-05"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2017-10918","kev_date_added":null,"published":"2017-07-05"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2017-10920","kev_date_added":null,"published":"2017-07-05"},{"cvss_score":10,"headline":"Memory corruption in n/a","id":"CVE-2017-10921","kev_date_added":null,"published":"2017-07-05"},{"cvss_score":9.8,"headline":"Mutiple vulnerabilities in the Viridian interface","id":"CVE-2025-27466","kev_date_added":null,"published":"2025-09-11"},{"cvss_score":9.8,"headline":"Mutiple vulnerabilities in the Viridian interface","id":"CVE-2025-58142","kev_date_added":null,"published":"2025-09-11"},{"cvss_score":9.8,"headline":"Mutiple vulnerabilities in the Viridian interface","id":"CVE-2025-58143","kev_date_added":null,"published":"2025-09-11"}],"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":"partial"},"state":"PUBLISHED","updated":"2026-03-23","vendors":["Xen"]},"summary":"An unprivileged guest can crash the Xenstore daemon or cause high CPU usage by accessing an illegal node path, impacting service availability.","url":"https://insights.sbomify.com/CVE-2026-23555/"}