{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "37745918e0e7575bc40f38da93a99b9fa6406224"
            },
            {
              "fixed": "38034d04d4a75bbca01df2b313ced0bcd0fa3242"
            },
            {
              "fixed": "3d39da65b5c422c5e5afb7d5651b0698d060a827"
            },
            {
              "fixed": "306427adf9b97e29e5958cb9cf3096c6151fc9ff"
            },
            {
              "fixed": "053a401b592be424fea9d57c789f66cd5d8cec11"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.12.0"
            },
            {
              "fixed": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53192.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: timer: Fix UAF at snd_timer_user_params()\n\nAt releasing a timer object, e.g. when a userspace timer\n(CONFIG_SND_UTIMER) gets closed and snd_timer_free() is called, it\ntries to detach the timer instances and release the resources.\nHowever, it's still possible that other in-flight tasks are holding\nthe timer instance where the to-be-deleted timer object is associated,\nand this may lead to racy accesses.\n\nFortunately, most of ioctls dealing with the timer instance list\nalready have the protection with register_mutex, and this also avoids\nsuch races.  But, SNDRV_TIMER_IOCTL_PARAMS isn't protected, hence the\nconcurrent ioctl may lead to use-after-free.\n\nThis patch just adds the guard with register_mutex to protect\nsnd_timer_user_params() for covering the code path as a quick\nworkaround.  It's no hot-path but rather a rarely issued ioctl, so the\nperformance penalty doesn't matter.",
  "id": "CVE-2026-53192",
  "modified": "2026-07-08T05:38:45.501199653Z",
  "published": "2026-06-25T08:39:03.696Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/053a401b592be424fea9d57c789f66cd5d8cec11"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/306427adf9b97e29e5958cb9cf3096c6151fc9ff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/38034d04d4a75bbca01df2b313ced0bcd0fa3242"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d39da65b5c422c5e5afb7d5651b0698d060a827"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53192.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53192"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ALSA: timer: Fix UAF at snd_timer_user_params()"
}