Vulnerability-Lookup

GHSA-M4JV-HG4P-X3X5

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-14 21:30

Details

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

firmware_loader: Fix use-after-free during unregister

In the following code within firmware_upload_unregister(), the call to device_unregister() could result in the dev_release function freeing the fw_upload_priv structure before it is dereferenced for the call to module_put(). This bug was found by the kernel test robot using CONFIG_KASAN while running the firmware selftests.

device_unregister(&fw_sysfs->dev); module_put(fw_upload_priv->module);

The problem is fixed by copying fw_upload_priv->module to a local variable for use when calling device_unregister().

Severity

7.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49951"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:22Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware_loader: Fix use-after-free during unregister\n\nIn the following code within firmware_upload_unregister(), the call to\ndevice_unregister() could result in the dev_release function freeing the\nfw_upload_priv structure before it is dereferenced for the call to\nmodule_put(). This bug was found by the kernel test robot using\nCONFIG_KASAN while running the firmware selftests.\n\n  device_unregister(\u0026fw_sysfs-\u003edev);\n  module_put(fw_upload_priv-\u003emodule);\n\nThe problem is fixed by copying fw_upload_priv-\u003emodule to a local variable\nfor use when calling device_unregister().",
  "id": "GHSA-m4jv-hg4p-x3x5",
  "modified": "2025-11-14T21:30:27Z",
  "published": "2025-06-18T12:30:36Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49951"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b40c38e37492b5bdf8e95b46b5cca9517a9957a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d380d40930a674c520a5b55f3be1eb17dc634ebc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49951 (GCVE-0-2022-49951)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:00 – Updated: 2026-05-11 19:09

Title

firmware_loader: Fix use-after-free during unregister

Summary

In the Linux kernel, the following vulnerability has been resolved: firmware_loader: Fix use-after-free during unregister In the following code within firmware_upload_unregister(), the call to device_unregister() could result in the dev_release function freeing the fw_upload_priv structure before it is dereferenced for the call to module_put(). This bug was found by the kernel test robot using CONFIG_KASAN while running the firmware selftests. device_unregister(&fw_sysfs->dev); module_put(fw_upload_priv->module); The problem is fixed by copying fw_upload_priv->module to a local variable for use when calling device_unregister().

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/d380d40930a674c52…
https://git.kernel.org/stable/c/8b40c38e37492b5bd…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 97730bbb242cde22b7140acd202ffd88823886c9 , < d380d40930a674c520a5b55f3be1eb17dc634ebc (git) Affected: 97730bbb242cde22b7140acd202ffd88823886c9 , < 8b40c38e37492b5bdf8e95b46b5cca9517a9957a (git)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 5.19.8 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

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{
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        {
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          "programFiles": [
            "drivers/base/firmware_loader/sysfs_upload.c"
          ],
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          "vendor": "Linux",
          "versions": [
            {
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              "versionType": "git"
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            {
              "lessThan": "8b40c38e37492b5bdf8e95b46b5cca9517a9957a",
              "status": "affected",
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              "versionType": "git"
            }
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          "versions": [
            {
              "status": "affected",
              "version": "5.19"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "5.19.8",
              "versionType": "semver"
            },
            {
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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\nfirmware_loader: Fix use-after-free during unregister\n\nIn the following code within firmware_upload_unregister(), the call to\ndevice_unregister() could result in the dev_release function freeing the\nfw_upload_priv structure before it is dereferenced for the call to\nmodule_put(). This bug was found by the kernel test robot using\nCONFIG_KASAN while running the firmware selftests.\n\n  device_unregister(\u0026fw_sysfs-\u003edev);\n  module_put(fw_upload_priv-\u003emodule);\n\nThe problem is fixed by copying fw_upload_priv-\u003emodule to a local variable\nfor use when calling device_unregister()."
        }
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      "providerMetadata": {
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    "datePublished": "2025-06-18T11:00:14.694Z",
    "dateReserved": "2025-06-18T10:57:27.382Z",
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    "state": "PUBLISHED"
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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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