github - ghsa-6h6f-84wv-5rqq

GHSA-6H6F-84WV-5RQQ

Vulnerability from github – Published: 2024-11-08 06:30 – Updated: 2024-11-19 18:30

Details

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

ring-buffer: Fix reader locking when changing the sub buffer order

The function ring_buffer_subbuf_order_set() updates each ring_buffer_per_cpu and installs new sub buffers that match the requested page order. This operation may be invoked concurrently with readers that rely on some of the modified data, such as the head bit (RB_PAGE_HEAD), or the ring_buffer_per_cpu.pages and reader_page pointers. However, no exclusive access is acquired by ring_buffer_subbuf_order_set(). Modifying the mentioned data while a reader also operates on them can then result in incorrect memory access and various crashes.

Fix the problem by taking the reader_lock when updating a specific ring_buffer_per_cpu in ring_buffer_subbuf_order_set().

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-2024-50207"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-667"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-08T06:15:17Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Fix reader locking when changing the sub buffer order\n\nThe function ring_buffer_subbuf_order_set() updates each\nring_buffer_per_cpu and installs new sub buffers that match the requested\npage order. This operation may be invoked concurrently with readers that\nrely on some of the modified data, such as the head bit (RB_PAGE_HEAD), or\nthe ring_buffer_per_cpu.pages and reader_page pointers. However, no\nexclusive access is acquired by ring_buffer_subbuf_order_set(). Modifying\nthe mentioned data while a reader also operates on them can then result in\nincorrect memory access and various crashes.\n\nFix the problem by taking the reader_lock when updating a specific\nring_buffer_per_cpu in ring_buffer_subbuf_order_set().",
  "id": "GHSA-6h6f-84wv-5rqq",
  "modified": "2024-11-19T18:30:54Z",
  "published": "2024-11-08T06:30:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50207"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09661f75e75cb6c1d2d8326a70c311d46729235f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a569290525a05162d5dd26d9845591eaf46e5802"
    }
  ],
  "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-2024-50207 (GCVE-0-2024-50207)

Vulnerability from cvelistv5 – Published: 2024-11-08 06:07 – Updated: 2025-10-01 20:27

Summary

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix reader locking when changing the sub buffer order The function ring_buffer_subbuf_order_set() updates each ring_buffer_per_cpu and installs new sub buffers that match the requested page order. This operation may be invoked concurrently with readers that rely on some of the modified data, such as the head bit (RB_PAGE_HEAD), or the ring_buffer_per_cpu.pages and reader_page pointers. However, no exclusive access is acquired by ring_buffer_subbuf_order_set(). Modifying the mentioned data while a reader also operates on them can then result in incorrect memory access and various crashes. Fix the problem by taking the reader_lock when updating a specific ring_buffer_per_cpu in ring_buffer_subbuf_order_set().

Severity ?

5.5 (Medium)


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

CWE

CWE-667 - Improper Locking

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/a569290525a05162d…
	https://git.kernel.org/stable/c/09661f75e75cb6c1d…

Impacted products

Vendor

Product

Version

Linux

Affected: 8e7b58c27b3c567316a51079b375b846f9223bba , < a569290525a05162d5dd26d9845591eaf46e5802 (git)
Affected: 8e7b58c27b3c567316a51079b375b846f9223bba , < 09661f75e75cb6c1d2d8326a70c311d46729235f (git)

Linux

Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.11.6 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-50207",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T20:17:32.092795Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-667",
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      }
    ],
    "cna": {
      "affected": [
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          "product": "Linux",
          "programFiles": [
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              "versionType": "git"
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          "versions": [
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              "version": "6.8"
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        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T09:48:44.161Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "title": "ring-buffer: Fix reader locking when changing the sub buffer order",
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    "datePublished": "2024-11-08T06:07:57.780Z",
    "dateReserved": "2024-10-21T19:36:19.969Z",
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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-6H6F-84WV-5RQQ

CVE-2024-50207 (GCVE-0-2024-50207)

Tags

Sightings

Nomenclature