Vulnerability-Lookup

GHSA-M7JG-4WJG-P9FX

Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 12:30

Details

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

usb: storage: realtek_cr: fix use-after-free on disconnect

realtek_cr_destructor() calls timer_delete() before the chip containing the timer is freed. The timer callback may still be running and can rearm itself, resulting in a use-after-free.

Use timer_shutdown_sync() to wait for the callback and prevent further rearming. Do this unconditionally because ss_en may be changed after the timer is armed.

Move timer_setup() into init_realtek_cr() so the timer is initialized before any failure path can invoke the destructor.

Found by static analysis.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-90029"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T11:17:15Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: storage: realtek_cr: fix use-after-free on disconnect\n\nrealtek_cr_destructor() calls timer_delete() before the chip containing\nthe timer is freed. The timer callback may still be running and can\nrearm itself, resulting in a use-after-free.\n\nUse timer_shutdown_sync() to wait for the callback and prevent further\nrearming. Do this unconditionally because ss_en may be changed after\nthe timer is armed.\n\nMove timer_setup() into init_realtek_cr() so the timer is initialized\nbefore any failure path can invoke the destructor.\n\nFound by static analysis.",
  "id": "GHSA-m7jg-4wjg-p9fx",
  "modified": "2026-09-16T12:30:45Z",
  "published": "2026-09-16T12:30:45Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90029"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7c4e2f964c65dea4ea22386799d5fb10ef1e3e54"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cae9dbba6adae21a04a3bd045e07b489847ff2c6"
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  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-90029 (GCVE-0-2026-90029)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:33 – Updated: 2026-09-16 10:33

Title

usb: storage: realtek_cr: fix use-after-free on disconnect

Summary

In the Linux kernel, the following vulnerability has been resolved: usb: storage: realtek_cr: fix use-after-free on disconnect realtek_cr_destructor() calls timer_delete() before the chip containing the timer is freed. The timer callback may still be running and can rearm itself, resulting in a use-after-free. Use timer_shutdown_sync() to wait for the callback and prevent further rearming. Do this unconditionally because ss_en may be changed after the timer is armed. Move timer_setup() into init_realtek_cr() so the timer is initialized before any failure path can invoke the destructor. Found by static analysis.

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/7c4e2f964c65dea4e…
https://git.kernel.org/stable/c/cae9dbba6adae21a0…
https://git.kernel.org/stable/c/4ffee1aebb0c0ffcd…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: e931830bb877e2aad9a1be83506f9bdb26c91e4e , < 7c4e2f964c65dea4ea22386799d5fb10ef1e3e54 (git) Affected: e931830bb877e2aad9a1be83506f9bdb26c91e4e , < cae9dbba6adae21a04a3bd045e07b489847ff2c6 (git) Affected: e931830bb877e2aad9a1be83506f9bdb26c91e4e , < 4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc (git)
Linux	Linux	Affected: 3.1 Unaffected: 0 , < 3.1 (semver) Unaffected: 6.18.51 , ≤ 6.18.* (semver) Unaffected: 7.2.5 , ≤ 7.2.* (semver) Unaffected: 7.3-rc2 , ≤ * (original_commit_for_fix)

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{
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        {
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          "programFiles": [
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      "cpeApplicability": [
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                  "versionStartIncluding": "3.1",
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                }
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: storage: realtek_cr: fix use-after-free on disconnect\n\nrealtek_cr_destructor() calls timer_delete() before the chip containing\nthe timer is freed. The timer callback may still be running and can\nrearm itself, resulting in a use-after-free.\n\nUse timer_shutdown_sync() to wait for the callback and prevent further\nrearming. Do this unconditionally because ss_en may be changed after\nthe timer is armed.\n\nMove timer_setup() into init_realtek_cr() so the timer is initialized\nbefore any failure path can invoke the destructor.\n\nFound by static analysis."
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      "providerMetadata": {
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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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