CVE-2026-52979 (GCVE-0-2026-52979)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-24 16:28
VLAI
Title
net: psp: check for device unregister when creating assoc
Summary
In the Linux kernel, the following vulnerability has been resolved: net: psp: check for device unregister when creating assoc psp_assoc_device_get_locked() obtains a psp_dev reference via psp_dev_get_for_sock() (which uses psp_dev_tryget() under RCU); it then acquires psd->lock and drops the reference. Before the lock is taken, psp_dev_unregister() can run to completion: take psd->lock, clear out state, unlock, drop the registration reference. The expectation is that the lock prevents device unregistration, but much like with netdevs special care has to be taken when "upgrading" a reference to a locked device. Add the missing check if device is still alive. psp_dev_is_registered() exists already but had no callers, which makes me wonder if I either forgot to add this or lost the check during refactoring...
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6b46ca260e2290e3453d1355ab5b6d283d73d780 , < d90df5ce6deb2424de3ad89bcc693ac1b67accc9 (git)
Affected: 6b46ca260e2290e3453d1355ab5b6d283d73d780 , < e201c57073e624dd2ba5beaf9eda31e19b77b332 (git)
Affected: 6b46ca260e2290e3453d1355ab5b6d283d73d780 , < b89769f936a8fa9e66de72ddc1b71a9745a488e6 (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/psp/psp_nl.c"
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              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: psp: check for device unregister when creating assoc\n\npsp_assoc_device_get_locked() obtains a psp_dev reference via\npsp_dev_get_for_sock() (which uses psp_dev_tryget() under RCU);\nit then acquires psd-\u003elock and drops the reference. Before\nthe lock is taken, psp_dev_unregister() can run to completion:\ntake psd-\u003elock, clear out state, unlock, drop the registration\nreference.\n\nThe expectation is that the lock prevents device unregistration,\nbut much like with netdevs special care has to be taken when\n\"upgrading\" a reference to a locked device. Add the missing\ncheck if device is still alive. psp_dev_is_registered() exists\nalready but had no callers, which makes me wonder if I either\nforgot to add this or lost the check during refactoring..."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:28:55.696Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/d90df5ce6deb2424de3ad89bcc693ac1b67accc9"
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        {
          "url": "https://git.kernel.org/stable/c/b89769f936a8fa9e66de72ddc1b71a9745a488e6"
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      "title": "net: psp: check for device unregister when creating assoc",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-52979",
    "datePublished": "2026-06-24T16:28:55.696Z",
    "dateReserved": "2026-06-09T07:44:35.376Z",
    "dateUpdated": "2026-06-24T16:28:55.696Z",
    "state": "PUBLISHED"
  },
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  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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