Vulnerability-Lookup

GHSA-GF8V-7H89-7W9J

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-24 18:32

Details

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...

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{
  "affected": [],
  "aliases": [
    "CVE-2026-52979"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:08Z",
    "severity": null
  },
  "details": "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...",
  "id": "GHSA-gf8v-7h89-7w9j",
  "modified": "2026-06-24T18:32:42Z",
  "published": "2026-06-24T18:32:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52979"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b89769f936a8fa9e66de72ddc1b71a9745a488e6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d90df5ce6deb2424de3ad89bcc693ac1b67accc9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e201c57073e624dd2ba5beaf9eda31e19b77b332"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-24 16:28

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

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/d90df5ce6deb2424d…
https://git.kernel.org/stable/c/e201c57073e624dd2…
https://git.kernel.org/stable/c/b89769f936a8fa9e6…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6b46ca260e2290e3453d1355ab5b6d283d73d780 , < d90df5ce6deb2424de3ad89bcc693ac1b67accc9 (git) Affected: 6b46ca260e2290e3453d1355ab5b6d283d73d780 , < e201c57073e624dd2ba5beaf9eda31e19b77b332 (git) Affected: 6b46ca260e2290e3453d1355ab5b6d283d73d780 , < b89769f936a8fa9e66de72ddc1b71a9745a488e6 (git)
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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/psp/psp_nl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d90df5ce6deb2424de3ad89bcc693ac1b67accc9",
              "status": "affected",
              "version": "6b46ca260e2290e3453d1355ab5b6d283d73d780",
              "versionType": "git"
            },
            {
              "lessThan": "e201c57073e624dd2ba5beaf9eda31e19b77b332",
              "status": "affected",
              "version": "6b46ca260e2290e3453d1355ab5b6d283d73d780",
              "versionType": "git"
            },
            {
              "lessThan": "b89769f936a8fa9e66de72ddc1b71a9745a488e6",
              "status": "affected",
              "version": "6b46ca260e2290e3453d1355ab5b6d283d73d780",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/psp/psp_nl.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/d90df5ce6deb2424de3ad89bcc693ac1b67accc9"
        },
        {
          "url": "https://git.kernel.org/stable/c/e201c57073e624dd2ba5beaf9eda31e19b77b332"
        },
        {
          "url": "https://git.kernel.org/stable/c/b89769f936a8fa9e66de72ddc1b71a9745a488e6"
        }
      ],
      "title": "net: psp: check for device unregister when creating assoc",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-GF8V-7H89-7W9J

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

Tags

Sightings

Nomenclature