{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-89715 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-89715 is a denial of service vulnerability in Linux, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-89715 and fix it if it is affected.\n\nWhat it is: CVE-2026-89715 is a denial of service vulnerability in Linux, published on 11 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-89715 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-2026-89715/ (Markdown: https://insights.sbomify.com/CVE-2026-89715/index.md)","id":"CVE-2026-89715","markdown":"https://insights.sbomify.com/CVE-2026-89715/index.md","name":"CVE-2026-89715","record":{"aliases":["BELL-CVE-2026-89715","DEBIAN-CVE-2026-89715","GHSA-r3wc-v3p2-877p","UBUNTU-CVE-2026-89715"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel NFS","requires_auth":"none","summary":"A reference leak in the Linux kernel NFS local I/O path allows attackers to exhaust resources and block network namespace teardown, causing denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nNFS/localio: fix ref leak on nfs_uuid_add_file failure\n\nWhen nfs_uuid_add_file() races with nfs_uuid_put() tearing down\nuuid-\u003enet, it returns -ENXIO without publishing nfl-\u003enfs_uuid via\nrcu_assign_pointer().  nfs_open_local_fh() then enters its error\nbranch and only releases the slot's file ref and its paired net\nref plus its own entry-time net ref, while the close path is a\nno-op:\n\n    nfs_close_local_fh()\n      nfs_uuid = rcu_dereference(nfl-\u003enfs_uuid);\n      if (!nfs_uuid) { rcu_read_unlock(); return; }  /* always */\n\nnfsd_open_local_fh() returns localio holding a caller-owned +1\nnfsd_file reference (from nfsd_file_get() after\nnfsd_file_acquire_local()) and an entry-time nfsd_net reference\n(from its first nfsd_net_try_get()) embedded as nf-\u003enf_net.  Both\nare leaked on the failure path, pinning one nfsd_file (and the\nunderlying struct file, dentry, inode) and one nfsd_net_ref per\noccurrence, which blocks nfsd_net and netns teardown.\n\nFix by releasing the caller-owned file ref and its net ref through\nthe existing helper, using a stack-local RCU pointer so the helper\ncan xchg it out, then returning -ENXIO so callers do not\ndereference a localio whose slot has been cleared:\n\n    struct nfsd_file __rcu *tmp = RCU_INITIALIZER(localio);\n\n    nfs_to_nfsd_file_put_local(pnf);\n    nfs_to_nfsd_file_put_local(\u0026tmp);\n    localio = ERR_PTR(-ENXIO);\n\nThe trailing nfs_to_nfsd_net_put(net) continues to release the\nouter net ref, so all three nfsd_net_try_get() increments are\nbalanced on the error branch.","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":"NFS/localio: fix ref leak on nfs_uuid_add_file failure","id":"CVE-2026-89715","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"zram: validate deflate params","id":"CVE-2026-89716"},"packages":[],"prev":{"headline":"NFS: fix delegation_hash_table leak when nfs4_server_common_setup() fails","id":"CVE-2026-89714"},"products":["Linux"],"published":"2026-09-11","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-19","vendors":["Linux"]},"summary":"A reference leak in the Linux kernel NFS local I/O path allows attackers to exhaust resources and block network namespace teardown, causing denial of service.","url":"https://insights.sbomify.com/CVE-2026-89715/"}