{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-68366 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-68366 is an use after free vulnerability in Linux, published on 24 Dec 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-2025-68366 and fix it if it is affected.\n\nWhat it is: CVE-2025-68366 is an use after free vulnerability in Linux, published on 24 Dec 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-2025-68366 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-2025-68366/ (Markdown: https://insights.sbomify.com/CVE-2025-68366/index.md)","id":"CVE-2025-68366","markdown":"https://insights.sbomify.com/CVE-2025-68366/index.md","name":"CVE-2025-68366","record":{"aliases":["AZL-73081","BELL-CVE-2025-68366","DEBIAN-CVE-2025-68366","GHSA-9x47-h3pc-w4pg","ROOT-OS-DEBIAN-11-CVE-2025-68366","ROOT-OS-DEBIAN-12-CVE-2025-68366","ROOT-OS-UBUNTU-2204-CVE-2025-68366","ROOT-OS-UBUNTU-2404-CVE-2025-68366","UBUNTU-CVE-2025-68366"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["privilege_escalation","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free in the Linux kernel NBD driver allows local attackers to cause a crash or potentially escalate privileges via race conditions.","user_interaction":"not_required","vuln_class":"use_after_free"},"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\nnbd: defer config unlock in nbd_genl_connect\n\nThere is one use-after-free warning when running NBD_CMD_CONNECT and\nNBD_CLEAR_SOCK:\n\nnbd_genl_connect\n  nbd_alloc_and_init_config // config_refs=1\n  nbd_start_device // config_refs=2\n  set NBD_RT_HAS_CONFIG_REF\t\t\topen nbd // config_refs=3\n  recv_work done // config_refs=2\n\t\t\t\t\t\tNBD_CLEAR_SOCK // config_refs=1\n\t\t\t\t\t\tclose nbd // config_refs=0\n  refcount_inc -\u003e uaf\n\n------------[ cut here ]------------\nrefcount_t: addition on 0; use-after-free.\nWARNING: CPU: 24 PID: 1014 at lib/refcount.c:25 refcount_warn_saturate+0x12e/0x290\n nbd_genl_connect+0x16d0/0x1ab0\n genl_family_rcv_msg_doit+0x1f3/0x310\n genl_rcv_msg+0x44a/0x790\n\nThe issue can be easily reproduced by adding a small delay before\nrefcount_inc(\u0026nbd-\u003econfig_refs) in nbd_genl_connect():\n\n        mutex_unlock(\u0026nbd-\u003econfig_lock);\n        if (!ret) {\n                set_bit(NBD_RT_HAS_CONFIG_REF, \u0026config-\u003eruntime_flags);\n+               printk(\"before sleep\\n\");\n+               mdelay(5 * 1000);\n+               printk(\"after sleep\\n\");\n                refcount_inc(\u0026nbd-\u003econfig_refs);\n                nbd_connect_reply(info, nbd-\u003eindex);\n        }","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":"nbd: defer config unlock in nbd_genl_connect","id":"CVE-2025-68366","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"use_after_free","year":"2025"},"n_packages":0,"n_references":8,"next":{"headline":"macintosh/mac_hid: fix race condition in mac_hid_toggle_emumouse","id":"CVE-2025-68367"},"packages":[],"prev":{"headline":"fs/ntfs3: Initialize allocated memory before use","id":"CVE-2025-68365"},"products":["Linux"],"published":"2025-12-24","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-16","vendors":["Linux"]},"summary":"A use-after-free in the Linux kernel NBD driver allows local attackers to cause a crash or potentially escalate privileges via race conditions.","url":"https://insights.sbomify.com/CVE-2025-68366/"}