ghsa-f47w-fp34-vr9h
Vulnerability from github
Published
2025-02-27 03:34
Modified
2025-11-03 21:32
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Details

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

bpf: Send signals asynchronously if !preemptible

BPF programs can execute in all kinds of contexts and when a program running in a non-preemptible context uses the bpf_send_signal() kfunc, it will cause issues because this kfunc can sleep. Change irqs_disabled() to !preemptible().

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{
  "affected": [],
  "aliases": [
    "CVE-2025-21728"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-27T02:15:16Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Send signals asynchronously if !preemptible\n\nBPF programs can execute in all kinds of contexts and when a program\nrunning in a non-preemptible context uses the bpf_send_signal() kfunc,\nit will cause issues because this kfunc can sleep.\nChange `irqs_disabled()` to `!preemptible()`.",
  "id": "GHSA-f47w-fp34-vr9h",
  "modified": "2025-11-03T21:32:57Z",
  "published": "2025-02-27T03:34:02Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-21728"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/092fc76b7ab4163e008f9cde596a58dad2108260"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78b97783496b454435639937db3303e900a24d3f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87c544108b612512b254c8f79aa5c0a8546e2cc4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be42a09fe898635b0093c0c8dac1bfabe225c240"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce51eab2070e295d298f42a2f1db269cd1b56d55"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e306eaaa3d78b462db5f5b11e0171f9d2b6ca3f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eeef8e65041a031bd8a747a392c14b76a123a12c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/feba1308bc5e8e04cee751d39fae8a9b407a9034"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}


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