GHSA-X768-G2CV-HV4J

Vulnerability from github – Published: 2025-03-27 18:31 – Updated: 2025-04-15 15:30
VLAI?
Details

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

firewire: fix memory leak for payload of request subaction to IEC 61883-1 FCP region

This patch is fix for Linux kernel v2.6.33 or later.

For request subaction to IEC 61883-1 FCP region, Linux FireWire subsystem have had an issue of use-after-free. The subsystem allows multiple user space listeners to the region, while data of the payload was likely released before the listeners execute read(2) to access to it for copying to user space.

The issue was fixed by a commit 281e20323ab7 ("firewire: core: fix use-after-free regression in FCP handler"). The object of payload is duplicated in kernel space for each listener. When the listener executes ioctl(2) with FW_CDEV_IOC_SEND_RESPONSE request, the object is going to be released.

However, it causes memory leak since the commit relies on call of release_request() in drivers/firewire/core-cdev.c. Against the expectation, the function is never called due to the design of release_client_resource(). The function delegates release task to caller when called with non-NULL fourth argument. The implementation of ioctl_send_response() is the case. It should release the object explicitly.

This commit fixes the bug.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2023-52989"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-03-27T17:15:46Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirewire: fix memory leak for payload of request subaction to IEC 61883-1 FCP region\n\nThis patch is fix for Linux kernel v2.6.33 or later.\n\nFor request subaction to IEC 61883-1 FCP region, Linux FireWire subsystem\nhave had an issue of use-after-free. The subsystem allows multiple\nuser space listeners to the region, while data of the payload was likely\nreleased before the listeners execute read(2) to access to it for copying\nto user space.\n\nThe issue was fixed by a commit 281e20323ab7 (\"firewire: core: fix\nuse-after-free regression in FCP handler\"). The object of payload is\nduplicated in kernel space for each listener. When the listener executes\nioctl(2) with FW_CDEV_IOC_SEND_RESPONSE request, the object is going to\nbe released.\n\nHowever, it causes memory leak since the commit relies on call of\nrelease_request() in drivers/firewire/core-cdev.c. Against the\nexpectation, the function is never called due to the design of\nrelease_client_resource(). The function delegates release task\nto caller when called with non-NULL fourth argument. The implementation\nof ioctl_send_response() is the case. It should release the object\nexplicitly.\n\nThis commit fixes the bug.",
  "id": "GHSA-x768-g2cv-hv4j",
  "modified": "2025-04-15T15:30:49Z",
  "published": "2025-03-27T18:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52989"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/356ff89acdbe6a66019154bc7eb2d300f5b15103"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/531390a243ef47448f8bad01c186c2787666bf4d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/53785fd9b315583cf029e39f72b73d23704a2253"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5f4543c9382ae2d5062f6aa4fecae0c9258d0b0e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b2cd3947d116bb9ba7ff097b5fc747a8956764db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c8bdc88216f09cb7387fedbdf613524367328616"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d5a2dcee53fa6e6e2822f93cb3f1b0cd23163bee"
    }
  ],
  "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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