Vulnerability-Lookup

GHSA-J74M-JP6J-HQP6

Vulnerability from github – Published: 2026-09-17 18:31 – Updated: 2026-09-17 18:31

Details

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

net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs()

sashiko is reporting that trying to read /sys/kernel/debug/ref_tracker/* causes use-afer-free crash when either alloc_percpu() or dev_addr_init() in alloc_netdev_mqs() failed, for commit 4d92b95ff2f9 ("net: add net device refcount tracker infrastructure") added ref_tracker_dir_exit() to only free_netdev() path.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90135"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-17T17:17:06Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: add missing ref_tracker_dir_exit() to alloc_netdev_mqs()\n\nsashiko is reporting that trying to read /sys/kernel/debug/ref_tracker/*\ncauses use-afer-free crash when either alloc_percpu() or dev_addr_init()\nin alloc_netdev_mqs() failed, for commit 4d92b95ff2f9 (\"net: add net device\nrefcount tracker infrastructure\") added ref_tracker_dir_exit() to only\nfree_netdev() path.",
  "id": "GHSA-j74m-jp6j-hqp6",
  "modified": "2026-09-17T18:31:52Z",
  "published": "2026-09-17T18:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90135"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b1c2af8a22c35cb099c735c2f63ea3ba757557d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2775bf36be7872834a7f8c0a0d9681a1a3e1cd4c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5fe03b5257095e2beef0bc79e1f068fbd09a24c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/63ab05e8f9654aa100d366c0236399fda6ffaab1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-90135 (GCVE-0-2026-90135)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:06 – Updated: 2026-09-17 16:06

Title

net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs()

Summary

In the Linux kernel, the following vulnerability has been resolved: net: add missing ref_tracker_dir_exit() to alloc_netdev_mqs() sashiko is reporting that trying to read /sys/kernel/debug/ref_tracker/* causes use-afer-free crash when either alloc_percpu() or dev_addr_init() in alloc_netdev_mqs() failed, for commit 4d92b95ff2f9 ("net: add net device refcount tracker infrastructure") added ref_tracker_dir_exit() to only free_netdev() path.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/2775bf36be7872834…
https://git.kernel.org/stable/c/5fe03b5257095e2be…
https://git.kernel.org/stable/c/63ab05e8f9654aa10…
https://git.kernel.org/stable/c/0b1c2af8a22c35cb0…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4d92b95ff2f95f13df9bad0b5a25a9f60e72758d , < 2775bf36be7872834a7f8c0a0d9681a1a3e1cd4c (git) Affected: 4d92b95ff2f95f13df9bad0b5a25a9f60e72758d , < 5fe03b5257095e2beef0bc79e1f068fbd09a24c7 (git) Affected: 4d92b95ff2f95f13df9bad0b5a25a9f60e72758d , < 63ab05e8f9654aa100d366c0236399fda6ffaab1 (git) Affected: 4d92b95ff2f95f13df9bad0b5a25a9f60e72758d , < 0b1c2af8a22c35cb099c735c2f63ea3ba757557d (git)
Linux	Linux	Affected: 5.17 Unaffected: 0 , < 5.17 (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.52 , ≤ 6.18.* (semver) Unaffected: 7.2.6 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/dev.c"
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          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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              "lessThan": "5fe03b5257095e2beef0bc79e1f068fbd09a24c7",
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
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              "versionType": "original_commit_for_fix"
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "5.17",
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    "datePublished": "2026-09-17T16:06:34.543Z",
    "dateReserved": "2026-09-11T19:38:34.788Z",
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    "state": "PUBLISHED"
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

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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GHSA-J74M-JP6J-HQP6

CVE-2026-90135 (GCVE-0-2026-90135)

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