Vulnerability-Lookup

GHSA-F8MJ-87C7-35X8

Vulnerability from github – Published: 2026-08-22 18:30 – Updated: 2026-08-23 15:33

Details

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

ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()

In rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0. This is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if when freed: free_buffer_page() relies on this value. Align the value with the actual allocation size (buffer::subbuf_order).

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74602"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T16:16:32Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()\n\nIn rb_allocate_cpu_buffer(), bpage-\u003eorder was omitted, leaving it as 0.\nThis is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if\nwhen freed: free_buffer_page() relies on this value. Align the value\nwith the actual allocation size (buffer::subbuf_order).",
  "id": "GHSA-f8mj-87c7-35x8",
  "modified": "2026-08-23T15:33:03Z",
  "published": "2026-08-22T18:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74602"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2e37f2bf111429fbfa4d985b12df3ba496ca70aa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d014e44b68ddd43f71288d2a4dbb1a259869149"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c620d89bae1a926ab7d626600285d3516c9f3c4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-74602 (GCVE-0-2026-74602)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:31 – Updated: 2026-08-23 12:47

Title

ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer()

Summary

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer() In rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0. This is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if when freed: free_buffer_page() relies on this value. Align the value with the actual allocation size (buffer::subbuf_order).

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/7c620d89bae1a926a…
https://git.kernel.org/stable/c/2e37f2bf111429fbf…
https://git.kernel.org/stable/c/3b3e0a6ee5bb3ac00…
https://git.kernel.org/stable/c/6d014e44b68ddd43f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f9b94daa542a8d2532f0930f01cd9aec2d19621b , < 7c620d89bae1a926ab7d626600285d3516c9f3c4 (git) Affected: f9b94daa542a8d2532f0930f01cd9aec2d19621b , < 2e37f2bf111429fbfa4d985b12df3ba496ca70aa (git) Affected: f9b94daa542a8d2532f0930f01cd9aec2d19621b , < 3b3e0a6ee5bb3ac000f135beef26b2b7ed1a771a (git) Affected: f9b94daa542a8d2532f0930f01cd9aec2d19621b , < 6d014e44b68ddd43f71288d2a4dbb1a259869149 (git)
Linux	Linux	Affected: 6.8 Unaffected: 0 , < 6.8 (semver) Unaffected: 6.12.105 , ≤ 6.12.* (semver) Unaffected: 6.18.45 , ≤ 6.18.* (semver) Unaffected: 7.1.9 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "kernel/trace/ring_buffer.c"
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      "providerMetadata": {
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    "datePublished": "2026-08-22T15:31:50.811Z",
    "dateReserved": "2026-08-15T05:44:03.919Z",
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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.

Action not permitted

GHSA-F8MJ-87C7-35X8

CVE-2026-74602 (GCVE-0-2026-74602)

Tags

Sightings

Nomenclature