CVE-2024-46682 (GCVE-0-2024-46682)

Vulnerability from cvelistv5 – Published: 2024-09-13 05:29 – Updated: 2026-05-11 20:34
VLAI?
Title
nfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open
Summary
In the Linux kernel, the following vulnerability has been resolved: nfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open Prior to commit 3f29cc82a84c ("nfsd: split sc_status out of sc_type") states_show() relied on sc_type field to be of valid type before calling into a subfunction to show content of a particular stateid. From that commit, we split the validity of the stateid into sc_status and no longer changed sc_type to 0 while unhashing the stateid. This resulted in kernel oopsing for nfsv4.0 opens that stay around and in nfs4_show_open() would derefence sc_file which was NULL. Instead, for closed open stateids forgo displaying information that relies of having a valid sc_file. To reproduce: mount the server with 4.0, read and close a file and then on the server cat /proc/fs/nfsd/clients/2/states [ 513.590804] Call trace: [ 513.590925] _raw_spin_lock+0xcc/0x160 [ 513.591119] nfs4_show_open+0x78/0x2c0 [nfsd] [ 513.591412] states_show+0x44c/0x488 [nfsd] [ 513.591681] seq_read_iter+0x5d8/0x760 [ 513.591896] seq_read+0x188/0x208 [ 513.592075] vfs_read+0x148/0x470 [ 513.592241] ksys_read+0xcc/0x178
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 3f29cc82a84c23cfd12b903029dd26002ca825f5 , < ba0b697de298285301c71c258598226e06494236 (git)
Affected: 3f29cc82a84c23cfd12b903029dd26002ca825f5 , < a204501e1743d695ca2930ed25a2be9f8ced96d3 (git)
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Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.10.8 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-46682\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-29T15:09:15.742949Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-29T15:09:19.833Z\"}}], \"cna\": {\"title\": \"nfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"3f29cc82a84c\", \"lessThan\": \"ba0b697de298\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"3f29cc82a84c\", \"lessThan\": \"a204501e1743\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/nfsd/nfs4state.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.9\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.9\", \"versionType\": \"custom\"}, {\"status\": \"unaffected\", \"version\": \"6.10.8\", \"versionType\": \"custom\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/nfsd/nfs4state.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/ba0b697de298285301c71c258598226e06494236\"}, {\"url\": \"https://git.kernel.org/stable/c/a204501e1743d695ca2930ed25a2be9f8ced96d3\"}], \"x_generator\": {\"engine\": \"bippy-c9c4e1df01b2\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open\\n\\nPrior to commit 3f29cc82a84c (\\\"nfsd: split sc_status out of\\nsc_type\\\") states_show() relied on sc_type field to be of valid\\ntype before calling into a subfunction to show content of a\\nparticular stateid. From that commit, we split the validity of\\nthe stateid into sc_status and no longer changed sc_type to 0\\nwhile unhashing the stateid. This resulted in kernel oopsing\\nfor nfsv4.0 opens that stay around and in nfs4_show_open()\\nwould derefence sc_file which was NULL.\\n\\nInstead, for closed open stateids forgo displaying information\\nthat relies of having a valid sc_file.\\n\\nTo reproduce: mount the server with 4.0, read and close\\na file and then on the server cat /proc/fs/nfsd/clients/2/states\\n\\n[  513.590804] Call trace:\\n[  513.590925]  _raw_spin_lock+0xcc/0x160\\n[  513.591119]  nfs4_show_open+0x78/0x2c0 [nfsd]\\n[  513.591412]  states_show+0x44c/0x488 [nfsd]\\n[  513.591681]  seq_read_iter+0x5d8/0x760\\n[  513.591896]  seq_read+0x188/0x208\\n[  513.592075]  vfs_read+0x148/0x470\\n[  513.592241]  ksys_read+0xcc/0x178\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-09-15T17:57:33.294Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-46682\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-09-29T15:09:29.944Z\", \"dateReserved\": \"2024-09-11T15:12:18.248Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-09-13T05:29:15.294Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • 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.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.