{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-64558 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-64558 is a high-severity memory corruption vulnerability in Linux, published on 29 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-2026-64558 and fix it if it is affected.\n\nWhat it is: CVE-2026-64558 is a high-severity memory corruption vulnerability in Linux, published on 29 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-2026-64558 in the wild and no public exploit code.\n\nAffected product: Linux. 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-2026-64558/ (Markdown: https://insights.sbomify.com/CVE-2026-64558/index.md)","id":"CVE-2026-64558","markdown":"https://insights.sbomify.com/CVE-2026-64558/index.md","name":"CVE-2026-64558","record":{"aliases":["BELL-CVE-2026-64558","DEBIAN-CVE-2026-64558","GHSA-82p5-pf6r-jcxr","UBUNTU-CVE-2026-64558"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A missing length check in the s390 pkey handler allows buffer overflows, potentially enabling code execution or privilege escalation in the Linux kernel.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-122","name":"Heap-based Buffer Overflow"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/pkey: Check length in pkey_pckmo handler implementation\n\nExplicitly check the length of the target buffer in the pkey_pckmo\nimplementation of the key_to_protkey() handler function. The handler\nfunction fails, if the generated output data exceeds the length of the\nprovided target buffer.","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":"s390/pkey: Check length in pkey_pckmo handler implementation","id":"CVE-2026-64558","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"s390/pkey: Check length in PKEY_VERIFYPROTK ioctl","id":"CVE-2026-64559"},"packages":[],"prev":{"headline":"Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_new_connection_cb()","id":"CVE-2026-64557"},"products":["Linux"],"published":"2026-07-29","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":"2026-10-19","vendors":["Linux"]},"summary":"A missing length check in the s390 pkey handler allows buffer overflows, potentially enabling code execution or privilege escalation in the Linux kernel.","url":"https://insights.sbomify.com/CVE-2026-64558/"}