Vulnerability-Lookup

GHSA-2W2H-C9PF-XXJF

Vulnerability from github – Published: 2026-11-02 18:32 – Updated: 2026-11-03 21:32

Details

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

tracing/syscalls: Use copy_from_user for the faultable syscall buffer

syscall_copy_user_array() copies the buffer argument of faultable syscalls (write, pwrite64, ...) with __copy_from_user(), which skips access_ok(). Use copy_from_user() instead so a non-user address is rejected and the entry is recorded as faulted.

It could be a security concern for machines that trust perf a bit too much.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-99232"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-11-02T16:17:48Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/syscalls: Use copy_from_user for the faultable syscall buffer\n\nsyscall_copy_user_array() copies the buffer argument of faultable\nsyscalls (write, pwrite64, ...) with __copy_from_user(), which skips\naccess_ok(). Use copy_from_user() instead so a non-user address is\nrejected and the entry is recorded as faulted.\n\nIt could be a security concern for machines that trust perf a bit too\nmuch.",
  "id": "GHSA-2w2h-c9pf-xxjf",
  "modified": "2026-11-03T21:32:00Z",
  "published": "2026-11-02T18:32:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-99232"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/041d1a568a11a7ed7415ef1408d0c65041c1ad69"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/097fd0050089df17b032f2b852b9b65e548e342a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e33e2718c62a602001ab549642a1aed0be797105"
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  ],
  "schema_version": "1.4.0",
  "severity": []
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CVE-2026-99232 (GCVE-0-2026-99232)

Vulnerability from cvelistv5 – Published: 2026-11-02 16:06 – Updated: 2026-11-03 19:13

Title

tracing/syscalls: Use copy_from_user for the faultable syscall buffer

Summary

In the Linux kernel, the following vulnerability has been resolved: tracing/syscalls: Use copy_from_user for the faultable syscall buffer syscall_copy_user_array() copies the buffer argument of faultable syscalls (write, pwrite64, ...) with __copy_from_user(), which skips access_ok(). Use copy_from_user() instead so a non-user address is rejected and the entry is recorded as faulted. It could be a security concern for machines that trust perf a bit too much.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6637 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/e33e2718c62a60200…
https://git.kernel.org/stable/c/041d1a568a11a7ed7…
https://git.kernel.org/stable/c/097fd0050089df17b…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: baa031b7bd2ce7502339174a42974321859ecd6a , < e33e2718c62a602001ab549642a1aed0be797105 (git) Affected: baa031b7bd2ce7502339174a42974321859ecd6a , < 041d1a568a11a7ed7415ef1408d0c65041c1ad69 (git) Affected: baa031b7bd2ce7502339174a42974321859ecd6a , < 097fd0050089df17b032f2b852b9b65e548e342a (git)
Linux	Linux	Affected: 6.19 Unaffected: 0 , < 6.19 (semver) Unaffected: 7.2.14 , ≤ 7.2.* (semver) Unaffected: 7.3.1 , ≤ 7.3.* (semver) Unaffected: 7.4-rc1 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
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          "programFiles": [
            "kernel/trace/trace_syscalls.c"
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              "versionType": "original_commit_for_fix"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/syscalls: Use copy_from_user for the faultable syscall buffer\n\nsyscall_copy_user_array() copies the buffer argument of faultable\nsyscalls (write, pwrite64, ...) with __copy_from_user(), which skips\naccess_ok(). Use copy_from_user() instead so a non-user address is\nrejected and the entry is recorded as faulted.\n\nIt could be a security concern for machines that trust perf a bit too\nmuch."
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      "providerMetadata": {
        "dateUpdated": "2026-11-03T19:13:01.998Z",
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    "datePublished": "2026-11-02T16:06:39.212Z",
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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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