GHSA-2HFC-XMH6-Q9F9

Vulnerability from github – Published: 2024-06-19 15:30 – Updated: 2024-11-09 00:30
VLAI?
Details

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

ALSA: timer: Set lower bound of start tick time

Currently ALSA timer doesn't have the lower limit of the start tick time, and it allows a very small size, e.g. 1 tick with 1ns resolution for hrtimer. Such a situation may lead to an unexpected RCU stall, where the callback repeatedly queuing the expire update, as reported by fuzzer.

This patch introduces a sanity check of the timer start tick time, so that the system returns an error when a too small start size is set. As of this patch, the lower limit is hard-coded to 100us, which is small enough but can still work somehow.

Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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{
  "affected": [],
  "aliases": [
    "CVE-2024-38618"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-06-19T14:15:21Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: timer: Set lower bound of start tick time\n\nCurrently ALSA timer doesn\u0027t have the lower limit of the start tick\ntime, and it allows a very small size, e.g. 1 tick with 1ns resolution\nfor hrtimer.  Such a situation may lead to an unexpected RCU stall,\nwhere  the callback repeatedly queuing the expire update, as reported\nby fuzzer.\n\nThis patch introduces a sanity check of the timer start tick time, so\nthat the system returns an error when a too small start size is set.\nAs of this patch, the lower limit is hard-coded to 100us, which is\nsmall enough but can still work somehow.",
  "id": "GHSA-2hfc-xmh6-q9f9",
  "modified": "2024-11-09T00:30:42Z",
  "published": "2024-06-19T15:30:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38618"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c95241ac5fc90c929d6c0c023e84bf0d30e84c3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4a63bd179fa8d3fcc44a0d9d71d941ddd62f0c4e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/68396c825c43664b20a3a1ba546844deb2b4e48f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/74bfb8d90f2601718ae203faf45a196844c01fa1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/83f0ba8592b9e258fd80ac6486510ab1dcd7ad6e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/abb1ad69d98cf1ff25bb14fff0e7c3f66239e1cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bdd0aa055b8ec7e24bbc19513f3231958741d0ab"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ceab795a67dd28dd942d0d8bba648c6c0f7a044b"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}


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