{"cve":"CVE-2024-39296","nvd":{"published":"2024-06-25T15:15:14.070","modified":"2026-06-17T07:41:39.843","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbonding: fix oops during rmmod\n\n\"rmmod bonding\" causes an oops ever since commit cc317ea3d927 (\"bonding:\nremove redundant NULL check in debugfs function\").  Here are the relevant\nfunctions being called:\n\nbonding_exit()\n  bond_destroy_debugfs()\n    debugfs_remove_recursive(bonding_debug_root);\n    bonding_debug_root = NULL; <--------- SET TO NULL HERE\n  bond_netlink_fini()\n    rtnl_link_unregister()\n      __rtnl_link_unregister()\n        unregister_netdevice_many_notify()\n          bond_uninit()\n            bond_debug_unregister()\n              (commit removed check for bonding_debug_root == NULL)\n              debugfs_remove()\n              simple_recursive_removal()\n                down_write() -> OOPS\n\nHowever, reverting the bad commit does not solve the problem completely\nbecause the original code contains a race that could cause the same\noops, although it was much less likely to be triggered unintentionally:\n\nCPU1\n  rmmod bonding\n    bonding_exit()\n      bond_destroy_debugfs()\n        debugfs_remove_recursive(bonding_debug_root);\n\nCPU2\n  echo -bond0 > /sys/class/net/bonding_masters\n    bond_uninit()\n      bond_debug_unregister()\n        if (!bonding_debug_root)\n\nCPU1\n        bonding_debug_root = NULL;\n\nSo do NOT revert the bad commit (since the removed checks were racy\nanyway), and instead change the order of actions taken during module\nremoval.  The same oops can also happen if there is an error during\nmodule init, so apply the same fix there.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","score":4.7},"cwes":["CWE-362","CWE-476"],"references":["https://git.kernel.org/stable/c/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece","https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6","https://git.kernel.org/stable/c/f07224c16678a8af54ddc059b3d2d51885d7f35e","https://git.kernel.org/stable/c/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece","https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:52:00.836172422+00:00"},"epss":{"cve":"CVE-2024-39296","score":0.00165,"percentile":0.05694,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}