{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-42495 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-42495 is a medium-severity vulnerability in Xen, published on 28 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-42495 and fix it if it is affected.\n\nWhat it is: CVE-2026-42495 is a medium-severity vulnerability in Xen, published on 28 Jul 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-42495 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-2026-42495/ (Markdown: https://insights.sbomify.com/CVE-2026-42495/index.md)","id":"CVE-2026-42495","markdown":"https://insights.sbomify.com/CVE-2026-42495/index.md","name":"CVE-2026-42495","record":{"aliases":["ALPINE-CVE-2026-42495","DEBIAN-CVE-2026-42495","GHSA-5rvw-g8r8-hfmx","UBUNTU-CVE-2026-42495"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Xen hypervisor","requires_auth":"none","summary":"An integer underflow in Xen's libfsimage iso9660 driver allows attackers to cause buffer overruns, potentially leading to denial of service or code execution.","user_interaction":"required","vuln_class":"integer_overflow"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"XEN","cpe":[],"cvss":{"score":5.5,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-191","name":"Integer Underflow (Wrap or Wraparound)"}],"description":"[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nThe directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver\nderives several lengths directly from attacker-controlled on-disk fields\nwithout validating them:\n\n * The directory loop itself assumes a good record length.  This is\n   CVE-2026-42494.\n\n * The calculation of the System Use area may underflow.  This is\n   CVE-2026-42495.\n\n * The Rock Ridge extension loop assumes a good (inner) record length.\n   This is CVE-2026-62423.\n\n * The Rock Ridge NM record processing assumes a good entry length.\n   This is CVE-2026-62424.\n\n * The Rock Ridge CE record processing assumes a good size and offset.\n   This is CVE-2026-62425.","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":"buffer overruns in libfsimage iso9660 handling","id":"CVE-2026-42495","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":"Path traversal in Archive::Tar","id":"CVE-2026-42496"},"packages":[],"prev":{"headline":"buffer overruns in libfsimage iso9660 handling","id":"CVE-2026-42494"},"products":["Xen"],"published":"2026-07-28","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-28","vendors":["Xen"]},"summary":"An integer underflow in Xen's libfsimage iso9660 driver allows attackers to cause buffer overruns, potentially leading to denial of service or code execution.","url":"https://insights.sbomify.com/CVE-2026-42495/"}