GHSA-GGVG-29PG-F22F

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:31
VLAI
Details

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

iio: buffer: hw-consumer: fix use-after-free in error path

In the err_put_buffers cleanup path of iio_hw_consumer_alloc(), the code was using list_for_each_entry() to iterate through buffers while calling iio_buffer_put() which can free the current buffer if refcount drops to 0. The list_for_each_entry() loop macro then evaluates buf->head.next to continue iteration, accessing the freed buffer.

Fix this by using list_for_each_entry_safe().

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-2026-63930"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:11Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: buffer: hw-consumer: fix use-after-free in error path\n\nIn the err_put_buffers cleanup path of iio_hw_consumer_alloc(), the code\nwas using list_for_each_entry() to iterate through buffers while calling\niio_buffer_put() which can free the current buffer if refcount drops to 0.\nThe list_for_each_entry() loop macro then evaluates buf-\u003ehead.next to\ncontinue iteration, accessing the freed buffer.\n\nFix this by using list_for_each_entry_safe().",
  "id": "GHSA-ggvg-29pg-f22f",
  "modified": "2026-07-20T15:31:52Z",
  "published": "2026-07-19T18:31:46Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-63930"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/29783e6b6ec0b7152a15e53a063f17537e81177d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2ff615fc455acda5425c4900160cbe11cfea4449"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6f5ed4f2c7c83f33344e0ba179f72a12e5dad4a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9319c94f63ed10723afd738d79f5617daba87cc8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a3763ae33476328cf8d661742deb9daec78eac96"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b71893c57730809c222766e5718bb33610f11963"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d2759d49860b9a39b5cde2fb88e4b822ddf5f58f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e965627f0d442bfcae3f496c90cb653fb0917a61"
    }
  ],
  "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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