github - ghsa-5q55-gh5r-h286

GHSA-5Q55-GH5R-H286

Vulnerability from github – Published: 2024-10-21 21:30 – Updated: 2024-10-24 21:31

Details

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

nfsd: fix possible badness in FREE_STATEID

When multiple FREE_STATEIDs are sent for the same delegation stateid, it can lead to a possible either use-after-free or counter refcount underflow errors.

In nfsd4_free_stateid() under the client lock we find a delegation stateid, however the code drops the lock before calling nfs4_put_stid(), that allows another FREE_STATE to find the stateid again. The first one will proceed to then free the stateid which leads to either use-after-free or decrementing already zeroed counter.

Severity ?

7.8 (High)


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

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  "affected": [],
  "aliases": [
    "CVE-2024-50043"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-10-21T20:15:17Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix possible badness in FREE_STATEID\n\nWhen multiple FREE_STATEIDs are sent for the same delegation stateid,\nit can lead to a possible either use-after-free or counter refcount\nunderflow errors.\n\nIn nfsd4_free_stateid() under the client lock we find a delegation\nstateid, however the code drops the lock before calling nfs4_put_stid(),\nthat allows another FREE_STATE to find the stateid again. The first one\nwill proceed to then free the stateid which leads to either\nuse-after-free or decrementing already zeroed counter.",
  "id": "GHSA-5q55-gh5r-h286",
  "modified": "2024-10-24T21:31:03Z",
  "published": "2024-10-21T21:30:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50043"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7ca9e472ce5c67daa3188a348ece8c02a0765039"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c88c150a467fcb670a1608e2272beeee3e86df6e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-50043 (GCVE-0-2024-50043)

Vulnerability from cvelistv5 – Published: 2024-10-21 19:39 – Updated: 2025-05-04 09:44

Summary

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix possible badness in FREE_STATEID When multiple FREE_STATEIDs are sent for the same delegation stateid, it can lead to a possible either use-after-free or counter refcount underflow errors. In nfsd4_free_stateid() under the client lock we find a delegation stateid, however the code drops the lock before calling nfs4_put_stid(), that allows another FREE_STATE to find the stateid again. The first one will proceed to then free the stateid which leads to either use-after-free or decrementing already zeroed counter.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/7ca9e472ce5c67daa…
	https://git.kernel.org/stable/c/c88c150a467fcb670…

Impacted products

Vendor

Product

Version

Linux

Affected: 3f29cc82a84c23cfd12b903029dd26002ca825f5 , < 7ca9e472ce5c67daa3188a348ece8c02a0765039 (git)
Affected: 3f29cc82a84c23cfd12b903029dd26002ca825f5 , < c88c150a467fcb670a1608e2272beeee3e86df6e (git)

Linux

Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.11.4 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)

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JSON

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                "timestamp": "2024-10-22T13:24:30.411615Z",
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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

GHSA-5Q55-GH5R-H286

CVE-2024-50043 (GCVE-0-2024-50043)

Tags

Sightings

Nomenclature