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GHSA-PW95-H85M-GVHP

Vulnerability from github – Published: 2026-10-28 12:31 – Updated: 2026-10-28 12:31

Details

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

ring-buffer: Do not show buffer_meta for CPUs without a buffer

The per_cpu/cpuN/buffer_meta files are created for every possible CPU, but buffer->buffers[cpu] is only allocated once that CPU comes online. Reading the file of a CPU that never came online dereferences a NULL cpu_buffer in rbm_start().

Fail the open with -ENODEV when the CPU has no buffer, as the other per CPU ring buffer interfaces do.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-99160"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-28T11:17:36Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Do not show buffer_meta for CPUs without a buffer\n\nThe per_cpu/cpuN/buffer_meta files are created for every possible CPU,\nbut buffer-\u003ebuffers[cpu] is only allocated once that CPU comes online.\nReading the file of a CPU that never came online dereferences a NULL\ncpu_buffer in rbm_start().\n\nFail the open with -ENODEV when the CPU has no buffer, as the other\nper CPU ring buffer interfaces do.",
  "id": "GHSA-pw95-h85m-gvhp",
  "modified": "2026-10-28T12:31:06Z",
  "published": "2026-10-28T12:31:06Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99160"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3f23cae09a4677a3f7c163a68388512cb231ff22"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8512d0312cc0ea83ca4511b164c29a138bbb0c21"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ae670c1a24fb5ffb167f26358cf47a5f0abbd670"
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}

CVE-2026-99160 (GCVE-0-2026-99160)

Vulnerability from cvelistv5 – Published: 2026-10-28 10:35 – Updated: 2026-10-28 10:35

Title

ring-buffer: Do not show buffer_meta for CPUs without a buffer

Summary

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Do not show buffer_meta for CPUs without a buffer The per_cpu/cpuN/buffer_meta files are created for every possible CPU, but buffer->buffers[cpu] is only allocated once that CPU comes online. Reading the file of a CPU that never came online dereferences a NULL cpu_buffer in rbm_start(). Fail the open with -ENODEV when the CPU has no buffer, as the other per CPU ring buffer interfaces do.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7033 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/8512d0312cc0ea83c…
https://git.kernel.org/stable/c/ae670c1a24fb5ffb1…
https://git.kernel.org/stable/c/3f23cae09a4677a3f…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 950032ffcee7a43c960951940059afc5a2bdbcbc , < 8512d0312cc0ea83ca4511b164c29a138bbb0c21 (git) Affected: 950032ffcee7a43c960951940059afc5a2bdbcbc , < ae670c1a24fb5ffb167f26358cf47a5f0abbd670 (git) Affected: 950032ffcee7a43c960951940059afc5a2bdbcbc , < 3f23cae09a4677a3f7c163a68388512cb231ff22 (git)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (semver) Unaffected: 6.18.59 , ≤ 6.18.* (semver) Unaffected: 7.2.13 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (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.

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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.
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