GHSA-W8W6-F4MM-HW75

Vulnerability from github – Published: 2026-06-25 09:31 – Updated: 2026-07-07 21:31
VLAI
Details

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

net: phonet: free phonet_device after RCU grace period

phonet_device_destroy() removes a phonet_device from the per-net device list with list_del_rcu(), but frees it immediately. RCU readers walking the same list can still hold a pointer to the object after it has been removed, leading to a slab-use-after-free.

Use kfree_rcu(), matching the lifetime rule already used by phonet_address_del() for the same object type.

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-2026-53157"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-25T09:16:33Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: phonet: free phonet_device after RCU grace period\n\nphonet_device_destroy() removes a phonet_device from the per-net device\nlist with list_del_rcu(), but frees it immediately. RCU readers walking\nthe same list can still hold a pointer to the object after it has been\nremoved, leading to a slab-use-after-free.\n\nUse kfree_rcu(), matching the lifetime rule already used by\nphonet_address_del() for the same object type.",
  "id": "GHSA-w8w6-f4mm-hw75",
  "modified": "2026-07-07T21:31:30Z",
  "published": "2026-06-25T09:31:19Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53157"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09c9b92c2010481160245244ea8fa1d06d5d4ae0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2ec8011cce0cd0fc7a5068585d867fc08d508578"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52b8f5ef82c886f7cd24617915e4b1579ddfd001"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6cd7067d6e4b0b2033ba2f918ecbd54dc2af3763"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/71de0177b28da751f407581a4515cf4d762f6296"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bd2ab4d800fc26814d89328d87b5f97ef6aa906a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bff309ea51f1395c1ef8be8b75ce62d28a319113"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d59794337ea496042288c7c68356d9b9ca7f46a9"
    }
  ],
  "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"
    }
  ]
}



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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.

Sightings

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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.