fkie_nvd - fkie_cve-2022-50241

FKIE_CVE-2022-50241

Vulnerability from fkie_nvd - Published: 2025-09-15 14:15 - Updated: 2025-11-25 14:42

Severity ?

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: NFSD: fix use-after-free on source server when doing inter-server copy Use-after-free occurred when the laundromat tried to free expired cpntf_state entry on the s2s_cp_stateids list after inter-server copy completed. The sc_cp_list that the expired copy state was inserted on was already freed. When COPY completes, the Linux client normally sends LOCKU(lock_state x), FREE_STATEID(lock_state x) and CLOSE(open_state y) to the source server. The nfs4_put_stid call from nfsd4_free_stateid cleans up the copy state from the s2s_cp_stateids list before freeing the lock state's stid. However, sometimes the CLOSE was sent before the FREE_STATEID request. When this happens, the nfsd4_close_open_stateid call from nfsd4_close frees all lock states on its st_locks list without cleaning up the copy state on the sc_cp_list list. When the time the FREE_STATEID arrives the server returns BAD_STATEID since the lock state was freed. This causes the use-after-free error to occur when the laundromat tries to free the expired cpntf_state. This patch adds a call to nfs4_free_cpntf_statelist in nfsd4_close_open_stateid to clean up the copy state before calling free_ol_stateid_reaplist to free the lock state's stid on the reaplist.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/019805fea91599b22dfa62ffb29c022f35abeb06	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/35aa0fb8c3033a3d78603356e96fc18c5b9cceb2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6ea71246b7a02af675d733e72d14bd0d591d5f4a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/83b94969751a691347606dbe6b1865efcfa5a643	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bbacfcde5fff25ac22597e8373a065c647da6738	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2B9CC1E9-3616-45E0-A70C-BF2E0DE70596",
              "versionEndExcluding": "5.10.150",
              "vulnerable": true
            },
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFSD: fix use-after-free on source server when doing inter-server copy\n\nUse-after-free occurred when the laundromat tried to free expired\ncpntf_state entry on the s2s_cp_stateids list after inter-server\ncopy completed. The sc_cp_list that the expired copy state was\ninserted on was already freed.\n\nWhen COPY completes, the Linux client normally sends LOCKU(lock_state x),\nFREE_STATEID(lock_state x) and CLOSE(open_state y) to the source server.\nThe nfs4_put_stid call from nfsd4_free_stateid cleans up the copy state\nfrom the s2s_cp_stateids list before freeing the lock state\u0027s stid.\n\nHowever, sometimes the CLOSE was sent before the FREE_STATEID request.\nWhen this happens, the nfsd4_close_open_stateid call from nfsd4_close\nfrees all lock states on its st_locks list without cleaning up the copy\nstate on the sc_cp_list list. When the time the FREE_STATEID arrives the\nserver returns BAD_STATEID since the lock state was freed. This causes\nthe use-after-free error to occur when the laundromat tries to free\nthe expired cpntf_state.\n\nThis patch adds a call to nfs4_free_cpntf_statelist in\nnfsd4_close_open_stateid to clean up the copy state before calling\nfree_ol_stateid_reaplist to free the lock state\u0027s stid on the reaplist."
    }
  ],
  "id": "CVE-2022-50241",
  "lastModified": "2025-11-25T14:42:06.403",
  "metrics": {
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2025-09-15T14:15:34.360",
  "references": [
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      "tags": [
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    },
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2022-50241 (GCVE-0-2022-50241)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:01 – Updated: 2025-09-15 14:01

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/bbacfcde5fff25ac2…
	https://git.kernel.org/stable/c/83b94969751a69134…
	https://git.kernel.org/stable/c/6ea71246b7a02af67…
	https://git.kernel.org/stable/c/35aa0fb8c3033a3d7…
	https://git.kernel.org/stable/c/019805fea91599b22…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < bbacfcde5fff25ac22597e8373a065c647da6738 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 83b94969751a691347606dbe6b1865efcfa5a643 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6ea71246b7a02af675d733e72d14bd0d591d5f4a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 35aa0fb8c3033a3d78603356e96fc18c5b9cceb2 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 019805fea91599b22dfa62ffb29c022f35abeb06 (git)

Linux

Unaffected: 5.10.150 , ≤ 5.10.* (semver)
Unaffected: 5.15.75 , ≤ 5.15.* (semver)
Unaffected: 5.19.17 , ≤ 5.19.* (semver)
Unaffected: 6.0.3 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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          "product": "Linux",
          "programFiles": [
            "fs/nfsd/nfs4state.c"
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              "version": "6.0.3",
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          "url": "https://git.kernel.org/stable/c/019805fea91599b22dfa62ffb29c022f35abeb06"
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  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

FKIE_CVE-2022-50241

CVE-2022-50241 (GCVE-0-2022-50241)

Tags

Sightings

Nomenclature