GHSA-X848-X286-CCWF

Vulnerability from github – Published: 2024-11-05 18:32 – Updated: 2025-11-04 00:31
VLAI?
Details

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

net: sched: fix use-after-free in taprio_change()

In 'taprio_change()', 'admin' pointer may become dangling due to sched switch / removal caused by 'advance_sched()', and critical section protected by 'q->current_entry_lock' is too small to prevent from such a scenario (which causes use-after-free detected by KASAN). Fix this by prefer 'rcu_replace_pointer()' over 'rcu_assign_pointer()' to update 'admin' immediately before an attempt to schedule freeing.

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-2024-50127"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-11-05T18:15:15Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sched: fix use-after-free in taprio_change()\n\nIn \u0027taprio_change()\u0027, \u0027admin\u0027 pointer may become dangling due to sched\nswitch / removal caused by \u0027advance_sched()\u0027, and critical section\nprotected by \u0027q-\u003ecurrent_entry_lock\u0027 is too small to prevent from such\na scenario (which causes use-after-free detected by KASAN). Fix this\nby prefer \u0027rcu_replace_pointer()\u0027 over \u0027rcu_assign_pointer()\u0027 to update\n\u0027admin\u0027 immediately before an attempt to schedule freeing.",
  "id": "GHSA-x848-x286-ccwf",
  "modified": "2025-11-04T00:31:55Z",
  "published": "2024-11-05T18:32:12Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50127"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d4c0d2844e4eac3aed647f948fd7e60eea56a61"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2240f9376f20f8b6463232b4ca7292569217237f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f868ce6013548a713c431c679ef73747a66fcf3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a283a19026aaae8a773fd8061263cfa315b127f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/999612996df28d81f163dad530d7f8026e03aec6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f504465970aebb2467da548f7c1efbbf36d0f44b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe371f084073e8672a2d7d46b335c3c060d1e301"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "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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