{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-79608 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-79608 is a critical vulnerability in Xen, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-79608 and fix it if it is affected.\n\nWhat it is: CVE-2026-79608 is a critical vulnerability in Xen, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-79608 in the wild and no public exploit code.\n\nAffected product: 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-2026-79608/ (Markdown: https://insights.sbomify.com/CVE-2026-79608/index.md)","id":"CVE-2026-79608","markdown":"https://insights.sbomify.com/CVE-2026-79608/index.md","name":"CVE-2026-79608","record":{"aliases":["ALPINE-CVE-2026-79608","DEBIAN-CVE-2026-79608","GHSA-979q-v7jv-rjpg","UBUNTU-CVE-2026-79608"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["data_read","security_bypass"],"network_reachable":"yes","non_default_config":false,"product_category":"Xen hypervisor","requires_auth":"none","summary":"A logic error in the Zenbleed mitigation allows attackers to bypass the security workaround, potentially exposing sensitive data.","user_interaction":"not_required","vuln_class":"security_feature_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"XEN","cpe":[],"cvss":{"score":9.8,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-670","name":"Always-Incorrect Control Flow Implementation"}],"description":"The workaround for XSA-433 (Zenbleed, CVE-2023-20593) was later\nre-worked to better integrate with other manipulations of the same MSR.\nIn this rework an inverted conditional was introduced, resulting in the\nworkaround to not be applied when needed and vice versa.\n\nFor more details, see:\n  http://xenbits.xen.org/xsa/advisory-433.html","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":"x86/AMD: ineffectual Zenbleed workaround","id":"CVE-2026-79608","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"security_feature_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"x86: XPTI may break on huge-memory systems","id":"CVE-2026-79609"},"packages":[],"prev":{"headline":"Xenstore: Guests can crash xenstored during Live Update","id":"CVE-2026-79607"},"products":["Xen"],"published":"2026-10-13","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-20","vendors":["Xen"]},"summary":"A logic error in the Zenbleed mitigation allows attackers to bypass the security workaround, potentially exposing sensitive data.","url":"https://insights.sbomify.com/CVE-2026-79608/"}