Vulnerability-Lookup

GHSA-2G8R-G5WP-XCXP

Vulnerability from github – Published: 2024-03-03 00:30 – Updated: 2025-01-16 18:30

Details

In the Linux kernel, the following vulnerability has been resolved:

netfs: Only call folio_start_fscache() one time for each folio

If a network filesystem using netfs implements a clamp_length() function, it can set subrequest lengths smaller than a page size.

When we loop through the folios in netfs_rreq_unlock_folios() to set any folios to be written back, we need to make sure we only call folio_start_fscache() once for each folio.

Otherwise, this simple testcase:

mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1 1+0 records in 1+0 records out 4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s echo 3 > /proc/sys/vm/drop_caches cat /mnt/nfs/file.bin > /dev/null

will trigger an oops similar to the following:

page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio)) ------------[ cut here ]------------ kernel BUG at include/linux/netfs.h:44! ... CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5 ... RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs] ... Call Trace: netfs_rreq_assess+0x497/0x660 [netfs] netfs_subreq_terminated+0x32b/0x610 [netfs] nfs_netfs_read_completion+0x14e/0x1a0 [nfs] nfs_read_completion+0x2f9/0x330 [nfs] rpc_free_task+0x72/0xa0 [sunrpc] rpc_async_release+0x46/0x70 [sunrpc] process_one_work+0x3bd/0x710 worker_thread+0x89/0x610 kthread+0x181/0x1c0 ret_from_fork+0x29/0x50

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52582"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-02T22:15:49Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Only call folio_start_fscache() one time for each folio\n\nIf a network filesystem using netfs implements a clamp_length()\nfunction, it can set subrequest lengths smaller than a page size.\n\nWhen we loop through the folios in netfs_rreq_unlock_folios() to\nset any folios to be written back, we need to make sure we only\ncall folio_start_fscache() once for each folio.\n\nOtherwise, this simple testcase:\n\n  mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs\n  dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1\n  1+0 records in\n  1+0 records out\n  4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s\n  echo 3 \u003e /proc/sys/vm/drop_caches\n  cat /mnt/nfs/file.bin \u003e /dev/null\n\nwill trigger an oops similar to the following:\n\n  page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))\n  ------------[ cut here ]------------\n  kernel BUG at include/linux/netfs.h:44!\n  ...\n  CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5\n  ...\n  RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]\n  ...\n  Call Trace:\n    netfs_rreq_assess+0x497/0x660 [netfs]\n    netfs_subreq_terminated+0x32b/0x610 [netfs]\n    nfs_netfs_read_completion+0x14e/0x1a0 [nfs]\n    nfs_read_completion+0x2f9/0x330 [nfs]\n    rpc_free_task+0x72/0xa0 [sunrpc]\n    rpc_async_release+0x46/0x70 [sunrpc]\n    process_one_work+0x3bd/0x710\n    worker_thread+0x89/0x610\n    kthread+0x181/0x1c0\n    ret_from_fork+0x29/0x50",
  "id": "GHSA-2g8r-g5wp-xcxp",
  "modified": "2025-01-16T18:30:57Z",
  "published": "2024-03-03T00:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52582"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d9f5537479d4ec97ea92ff24e81a517d5772581a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df1c357f25d808e30b216188330e708e09e1a412"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df9950d37df113db59495fa09d060754366a2b7c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-52582 (GCVE-0-2023-52582)

Vulnerability from cvelistv5 – Published: 2024-03-02 21:59 – Updated: 2026-05-11 19:29

Title

netfs: Only call folio_start_fscache() one time for each folio

Summary

In the Linux kernel, the following vulnerability has been resolved: netfs: Only call folio_start_fscache() one time for each folio If a network filesystem using netfs implements a clamp_length() function, it can set subrequest lengths smaller than a page size. When we loop through the folios in netfs_rreq_unlock_folios() to set any folios to be written back, we need to make sure we only call folio_start_fscache() once for each folio. Otherwise, this simple testcase: mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1 1+0 records in 1+0 records out 4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s echo 3 > /proc/sys/vm/drop_caches cat /mnt/nfs/file.bin > /dev/null will trigger an oops similar to the following: page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio)) ------------[ cut here ]------------ kernel BUG at include/linux/netfs.h:44! ... CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5 ... RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs] ... Call Trace: netfs_rreq_assess+0x497/0x660 [netfs] netfs_subreq_terminated+0x32b/0x610 [netfs] nfs_netfs_read_completion+0x14e/0x1a0 [nfs] nfs_read_completion+0x2f9/0x330 [nfs] rpc_free_task+0x72/0xa0 [sunrpc] rpc_async_release+0x46/0x70 [sunrpc] process_one_work+0x3bd/0x710 worker_thread+0x89/0x610 kthread+0x181/0x1c0 ret_from_fork+0x29/0x50

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-03-04 19:13 UTC

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/df9950d37df113db5…
https://git.kernel.org/stable/c/d9f5537479d4ec97e…
https://git.kernel.org/stable/c/df1c357f25d808e30…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3d3c95046742e4eebaa4b891b0b01cbbed94ebbd , < df9950d37df113db59495fa09d060754366a2b7c (git) Affected: 3d3c95046742e4eebaa4b891b0b01cbbed94ebbd , < d9f5537479d4ec97ea92ff24e81a517d5772581a (git) Affected: 3d3c95046742e4eebaa4b891b0b01cbbed94ebbd , < df1c357f25d808e30b216188330e708e09e1a412 (git)
Linux	Linux	Affected: 5.13 Unaffected: 0 , < 5.13 (semver) Unaffected: 6.1.56 , ≤ 6.1.* (semver) Unaffected: 6.5.6 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix)

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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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