{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-58151 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-58151 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-58151 is a critical vulnerability in Xen varstored, published on 9 Jul 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-2025-58151 and fix it if it is affected.\n\nWhat it is: CVE-2025-58151 is a critical vulnerability in Xen varstored, published on 9 Jul 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-2025-58151 in the wild and no public exploit code.\n\nAffected product: Xen varstored. 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-2025-58151/ (Markdown: https://insights.sbomify.com/CVE-2025-58151/index.md)","id":"CVE-2025-58151","markdown":"https://insights.sbomify.com/CVE-2025-58151/index.md","name":"CVE-2025-58151","record":{"aliases":["GHSA-78gx-8v3c-jqwc"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Xen hypervisor component","requires_auth":"none","summary":"A time-of-check time-of-use race condition in Xen's varstored allows attackers to control jump table indices, potentially leading to code execution.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"XEN","cpe":[],"cvss":{"score":9.4,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-367","name":"Time-of-check Time-of-use (TOCTOU) Race Condition"}],"description":"varstored is a component of the Xapi toolstack handling UEFI Variables\nfor a VM.  It has a communication path with OVMF inside the VM involving\nmapping a buffer prepared by OVMF.\n\nWithin varstored, there were insufficient compiler barriers, creating\nTOCTOU issues with data in the shared buffer.\n\nThe exact vulnerable behaviour depends on the code generated by the\ncompiler.  In a build of varstored using default settings, the attacker\ncan control an index used in a jump table.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"varstored: TOCTOU issues with mapped guest memory","id":"CVE-2025-58151","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"race_condition","year":"2025"},"n_packages":0,"n_references":1,"next":{"headline":"Information disclosure in FutureNet IP-K series","id":"CVE-2025-58152"},"packages":[],"prev":{"headline":"x86: buffer overrun with shadow paging + tracing","id":"CVE-2025-58150"},"products":["varstored"],"published":"2026-07-09","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":"2026-07-09","vendors":["Xen"]},"summary":"A time-of-check time-of-use race condition in Xen's varstored allows attackers to control jump table indices, potentially leading to code execution.","url":"https://insights.sbomify.com/CVE-2025-58151/"}