{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-64043 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-64043 is a medium-severity vulnerability in Linux kernel, published on 19 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-2026-64043 and fix it if it is affected.\n\nWhat it is: CVE-2026-64043 is a medium-severity vulnerability in Linux kernel, published on 19 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-2026-64043 in the wild and no public exploit code.\n\nAffected product: Linux kernel. 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-2026-64043/ (Markdown: https://insights.sbomify.com/CVE-2026-64043/index.md)","id":"CVE-2026-64043","markdown":"https://insights.sbomify.com/CVE-2026-64043/index.md","name":"CVE-2026-64043","record":{"aliases":["BELL-CVE-2026-64043","DEBIAN-CVE-2026-64043","GHSA-74fm-4xxg-774p","UBUNTU-CVE-2026-64043"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel OVPN","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel OVPN module allows a local attacker to cause a denial of service by hanging the network device during interface deletion.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":4.7,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\novpn: fix race between deleting interface and adding new peer\n\nWhile deleting an existing ovpn interface, there is a very\nnarrow window where adding a new peer via netlink may cause\nthe netdevice to hang and prevent its unregistration.\n\nIt may happen during ovpn_dellink(), when all existing peers are\nfreed and the device is queued for deregistration, but a\nCMD_PEER_NEW message comes in adding a new peer that takes again\na reference to the netdev.\n\nAt this point there is no way to release the device because we are\nunder the assumption that all peers were already released.\n\nFix the race condition by releasing all peers in ndo_uninit(),\nwhen the netdevice has already been removed from the netdev\nlist.\n\nAlso ovpn_peer_add() has now an extra check that forces the\nfunction to bail out if the device reg_state is not REGISTERED.\nThis way any incoming CMD_PEER_NEW racing with the interface\ndeletion routine will simply stop before adding the peer.\n\nNote that the above check happens while holding the netdev_lock\nto prevent racing netdev state changes.\n\novpn_dellink() is now empty and can be removed.","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":"ovpn: fix race between deleting interface and adding new peer","id":"CVE-2026-64043","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"race_condition","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"ovpn: respect peer refcount in CMD_NEW_PEER error path","id":"CVE-2026-64044"},"packages":[],"prev":{"headline":"vfio/pci: Check BAR resources before exporting a DMABUF","id":"CVE-2026-64042"},"products":["Linux"],"published":"2026-07-19","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-07-19","vendors":["Linux"]},"summary":"A race condition in the Linux kernel OVPN module allows a local attacker to cause a denial of service by hanging the network device during interface deletion.","url":"https://insights.sbomify.com/CVE-2026-64043/"}