{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-62426 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-62426 is a high-severity denial of service vulnerability in Xen, published on 28 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-62426 and fix it if it is affected.\n\nWhat it is: CVE-2026-62426 is a high-severity denial of service vulnerability in Xen, published on 28 Jul 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-2026-62426 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-2026-62426/ (Markdown: https://insights.sbomify.com/CVE-2026-62426/index.md)","id":"CVE-2026-62426","markdown":"https://insights.sbomify.com/CVE-2026-62426/index.md","name":"CVE-2026-62426","record":{"aliases":["ALPINE-CVE-2026-62426","DEBIAN-CVE-2026-62426","GHSA-f8j9-mrwg-r7g5","UBUNTU-CVE-2026-62426"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Xen hypervisor","requires_auth":"low_privilege","summary":"An attacker can cause a denial of service in the Xen hypervisor by abusing unfair system-wide locks in sysctl operations.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"XEN","cpe":[],"cvss":{"score":8.8,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-667","name":"Improper Locking"},{"id":"CWE-412","name":"Unrestricted Externally Accessible Lock"}],"description":"[This CNA information record relates to multiple CVEs; the\ntext explains which aspects/vulnerabilities correspond to which CVE.]\n\nTo manage the system, sysctl and platform operations are used by the\ncontrol domain or a possible Xenstore domain.  Some of these operations\nmay not be executed in parallel, so a system-wide lock each is used.\nThe way those locks are acquired is, however, not providing any fairness.\nFurthermore, with XSM/Flask in use, the lock acquire will, for some\noperations, occur ahead of any permission checking.\n\nThe sysctl issue is CVE-2026-62426.\n\nThe platform-op issue is CVE-2026-62427.","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":"sysctl and platform-op locks open to abuse","id":"CVE-2026-62426","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"sysctl and platform-op locks open to abuse","id":"CVE-2026-62427"},"packages":[],"prev":{"headline":"buffer overruns in libfsimage iso9660 handling","id":"CVE-2026-62425"},"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":"total"},"state":"PUBLISHED","updated":"2026-07-28","vendors":["Xen"]},"summary":"An attacker can cause a denial of service in the Xen hypervisor by abusing unfair system-wide locks in sysctl operations.","url":"https://insights.sbomify.com/CVE-2026-62426/"}