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GHSA-6W2X-XMW9-V3HC

Vulnerability from github – Published: 2025-03-12 00:31 – Updated: 2025-03-12 00:31

Details

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

sysctl: Fix data races in proc_douintvec_minmax().

A sysctl variable is accessed concurrently, and there is always a chance of data-race. So, all readers and writers need some basic protection to avoid load/store-tearing.

This patch changes proc_douintvec_minmax() to use READ_ONCE() and WRITE_ONCE() internally to fix data-races on the sysctl side. For now, proc_douintvec_minmax() itself is tolerant to a data-race, but we still need to add annotations on the other subsystem's side.

Severity

4.7 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49640"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:39Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsysctl: Fix data races in proc_douintvec_minmax().\n\nA sysctl variable is accessed concurrently, and there is always a chance\nof data-race.  So, all readers and writers need some basic protection to\navoid load/store-tearing.\n\nThis patch changes proc_douintvec_minmax() to use READ_ONCE() and\nWRITE_ONCE() internally to fix data-races on the sysctl side.  For now,\nproc_douintvec_minmax() itself is tolerant to a data-race, but we still\nneed to add annotations on the other subsystem\u0027s side.",
  "id": "GHSA-6w2x-xmw9-v3hc",
  "modified": "2025-03-12T00:31:48Z",
  "published": "2025-03-12T00:31:48Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49640"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d3b559df3ed39258737789aae2ae7973d205bc1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40e0477a7371d101c55b69d9c32a7a1ed82ab5ea"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b60eddf98b9716651069dfda296c91311a7a6293"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e3a2144b3b6bf9ecafd91087c8b8b48171ec19df"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49640 (GCVE-0-2022-49640)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:23 – Updated: 2026-05-11 19:03

Title

sysctl: Fix data races in proc_douintvec_minmax().

Summary

In the Linux kernel, the following vulnerability has been resolved: sysctl: Fix data races in proc_douintvec_minmax(). A sysctl variable is accessed concurrently, and there is always a chance of data-race. So, all readers and writers need some basic protection to avoid load/store-tearing. This patch changes proc_douintvec_minmax() to use READ_ONCE() and WRITE_ONCE() internally to fix data-races on the sysctl side. For now, proc_douintvec_minmax() itself is tolerant to a data-race, but we still need to add annotations on the other subsystem's side.

Severity

4.7 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 19:34 UTC

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/e3a2144b3b6bf9eca…
https://git.kernel.org/stable/c/40e0477a7371d101c…
https://git.kernel.org/stable/c/b60eddf98b9716651…
https://git.kernel.org/stable/c/2d3b559df3ed39258…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 61d9b56a89208d8cccd0b4cfec7e6959717e16e3 , < e3a2144b3b6bf9ecafd91087c8b8b48171ec19df (git) Affected: 61d9b56a89208d8cccd0b4cfec7e6959717e16e3 , < 40e0477a7371d101c55b69d9c32a7a1ed82ab5ea (git) Affected: 61d9b56a89208d8cccd0b4cfec7e6959717e16e3 , < b60eddf98b9716651069dfda296c91311a7a6293 (git) Affected: 61d9b56a89208d8cccd0b4cfec7e6959717e16e3 , < 2d3b559df3ed39258737789aae2ae7973d205bc1 (git)
Linux	Linux	Affected: 4.13 Unaffected: 0 , < 4.13 (semver) Unaffected: 5.10.132 , ≤ 5.10.* (semver) Unaffected: 5.15.56 , ≤ 5.15.* (semver) Unaffected: 5.18.13 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix)

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JSON

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              "confidentialityImpact": "NONE",
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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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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