CVE-2024-39296 (GCVE-0-2024-39296)

Vulnerability from cvelistv5 – Published: 2024-06-25 14:22 – Updated: 2025-05-04 09:16
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: bonding: fix oops during rmmod "rmmod bonding" causes an oops ever since commit cc317ea3d927 ("bonding: remove redundant NULL check in debugfs function"). Here are the relevant functions being called: bonding_exit() bond_destroy_debugfs() debugfs_remove_recursive(bonding_debug_root); bonding_debug_root = NULL; <--------- SET TO NULL HERE bond_netlink_fini() rtnl_link_unregister() __rtnl_link_unregister() unregister_netdevice_many_notify() bond_uninit() bond_debug_unregister() (commit removed check for bonding_debug_root == NULL) debugfs_remove() simple_recursive_removal() down_write() -> OOPS However, reverting the bad commit does not solve the problem completely because the original code contains a race that could cause the same oops, although it was much less likely to be triggered unintentionally: CPU1 rmmod bonding bonding_exit() bond_destroy_debugfs() debugfs_remove_recursive(bonding_debug_root); CPU2 echo -bond0 > /sys/class/net/bonding_masters bond_uninit() bond_debug_unregister() if (!bonding_debug_root) CPU1 bonding_debug_root = NULL; So do NOT revert the bad commit (since the removed checks were racy anyway), and instead change the order of actions taken during module removal. The same oops can also happen if there is an error during module init, so apply the same fix there.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: cc317ea3d9272fab4f6fef527c865f30ca479394 , < f07224c16678a8af54ddc059b3d2d51885d7f35e (git)
Affected: cc317ea3d9272fab4f6fef527c865f30ca479394 , < cf48aee81103ca06d09d73d33fb72f1191069aa6 (git)
Affected: cc317ea3d9272fab4f6fef527c865f30ca479394 , < a45835a0bb6ef7d5ddbc0714dd760de979cb6ece (git)
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    Linux Linux Affected: 6.6
Unaffected: 0 , < 6.6 (semver)
Unaffected: 6.6.34 , ≤ 6.6.* (semver)
Unaffected: 6.9.5 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f07224c16678a8af54ddc059b3d2d51885d7f35e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T04:19:20.715Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-39296\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-25T20:46:46.560534Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-25T20:46:50.961Z\"}}], \"cna\": {\"title\": \"bonding: fix oops during rmmod\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"cc317ea3d9272fab4f6fef527c865f30ca479394\", \"lessThan\": \"f07224c16678a8af54ddc059b3d2d51885d7f35e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"cc317ea3d9272fab4f6fef527c865f30ca479394\", \"lessThan\": \"cf48aee81103ca06d09d73d33fb72f1191069aa6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"cc317ea3d9272fab4f6fef527c865f30ca479394\", \"lessThan\": \"a45835a0bb6ef7d5ddbc0714dd760de979cb6ece\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/bonding/bond_main.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.6.34\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.5\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/bonding/bond_main.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f07224c16678a8af54ddc059b3d2d51885d7f35e\"}, {\"url\": \"https://git.kernel.org/stable/c/cf48aee81103ca06d09d73d33fb72f1191069aa6\"}, {\"url\": \"https://git.kernel.org/stable/c/a45835a0bb6ef7d5ddbc0714dd760de979cb6ece\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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; \u003c--------- 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() -\u003e 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 \u003e /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.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T09:06:31.541Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-39296\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T09:06:31.541Z\", \"dateReserved\": \"2024-06-24T13:54:11.074Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-06-25T14:22:40.218Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.