{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-37864 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-37864 is a medium-severity denial of service vulnerability in Linux kernel, published on 9 May 2025. 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-2025-37864 and fix it if it is affected.\n\nWhat it is: CVE-2025-37864 is a medium-severity denial of service vulnerability in Linux kernel, published on 9 May 2025. 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-2025-37864 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-2025-37864/ (Markdown: https://insights.sbomify.com/CVE-2025-37864/index.md)","id":"CVE-2025-37864","markdown":"https://insights.sbomify.com/CVE-2025-37864/index.md","name":"CVE-2025-37864","record":{"aliases":["BELL-CVE-2025-37864","DEBIAN-CVE-2025-37864","GHSA-qrvm-x4ph-76fj","ROOT-OS-DEBIAN-12-CVE-2025-37864","ROOT-OS-UBUNTU-2204-CVE-2025-37864","ROOT-OS-UBUNTU-2404-CVE-2025-37864","UBUNTU-CVE-2025-37864"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel DSA","requires_auth":"low_privilege","summary":"A missing cleanup of network entries during driver unbind can trigger kernel warnings or crashes, potentially causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-617","name":"Reachable Assertion"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: clean up FDB, MDB, VLAN entries on unbind\n\nAs explained in many places such as commit b117e1e8a86d (\"net: dsa:\ndelete dsa_legacy_fdb_add and dsa_legacy_fdb_del\"), DSA is written given\nthe assumption that higher layers have balanced additions/deletions.\nAs such, it only makes sense to be extremely vocal when those\nassumptions are violated and the driver unbinds with entries still\npresent.\n\nBut Ido Schimmel points out a very simple situation where that is wrong:\nhttps://lore.kernel.org/netdev/ZDazSM5UsPPjQuKr@shredder/\n(also briefly discussed by me in the aforementioned commit).\n\nBasically, while the bridge bypass operations are not something that DSA\nexplicitly documents, and for the majority of DSA drivers this API\nsimply causes them to go to promiscuous mode, that isn't the case for\nall drivers. Some have the necessary requirements for bridge bypass\noperations to do something useful - see dsa_switch_supports_uc_filtering().\n\nAlthough in tools/testing/selftests/net/forwarding/local_termination.sh,\nwe made an effort to popularize better mechanisms to manage address\nfilters on DSA interfaces from user space - namely macvlan for unicast,\nand setsockopt(IP_ADD_MEMBERSHIP) - through mtools - for multicast, the\nfact is that 'bridge fdb add ... self static local' also exists as\nkernel UAPI, and might be useful to someone, even if only for a quick\nhack.\n\nIt seems counter-productive to block that path by implementing shim\n.ndo_fdb_add and .ndo_fdb_del operations which just return -EOPNOTSUPP\nin order to prevent the ndo_dflt_fdb_add() and ndo_dflt_fdb_del() from\nrunning, although we could do that.\n\nAccepting that cleanup is necessary seems to be the only option.\nEspecially since we appear to be coming back at this from a different\nangle as well. Russell King is noticing that the WARN_ON() triggers even\nfor VLANs:\nhttps://lore.kernel.org/netdev/Z_li8Bj8bD4-BYKQ@shell.armlinux.org.uk/\n\nWhat happens in the bug report above is that dsa_port_do_vlan_del() fails,\nthen the VLAN entry lingers on, and then we warn on unbind and leak it.\n\nThis is not a straight revert of the blamed commit, but we now add an\ninformational print to the kernel log (to still have a way to see\nthat bugs exist), and some extra comments gathered from past years'\nexperience, to justify the logic.","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":"net: dsa: clean up FDB, MDB, VLAN entries on unbind","id":"CVE-2025-37864","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2025"},"n_packages":0,"n_references":5,"next":{"headline":"net: dsa: mv88e6xxx: fix -ENOENT when deleting VLANs and MST is unsupported","id":"CVE-2025-37865"},"packages":[],"prev":{"headline":"ovl: don't allow datadir only","id":"CVE-2025-37863"},"products":["Linux"],"published":"2025-05-09","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":"2026-06-01","vendors":["Linux"]},"summary":"A missing cleanup of network entries during driver unbind can trigger kernel warnings or crashes, potentially causing a denial of service.","url":"https://insights.sbomify.com/CVE-2025-37864/"}