{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f9b94daa542a8d2532f0930f01cd9aec2d19621b"
            },
            {
              "fixed": "b45b91db41379ee5fb36c187d6d7c37b725cbe8e"
            },
            {
              "fixed": "62978cf6347972c04130e4e841ba404504d92b32"
            },
            {
              "fixed": "7568e9e717e7540bd05bcc007f5d76fcaff3cdff"
            },
            {
              "fixed": "bf98d7b0d5a99991e47e66cee4eb1d3fa514be97"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.8.0"
            },
            {
              "fixed": "6.12.104"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.45"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74634.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Prevent subbuf order change when resizing is disabled\n\nBecause ring_buffer_subbuf_order_set() frees buffer pages, we can't\nallow it when resizing is disabled. A non-consuming reader is at risk of\nuse-after-free (rb_advance_iter()).\n\nReturn -EBUSY on resize_disabled, matching ring_buffer_resize()\nbehaviour.",
  "id": "CVE-2026-74634",
  "modified": "2026-08-27T11:30:40.850845879Z",
  "published": "2026-08-22T15:32:14.547Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/62978cf6347972c04130e4e841ba404504d92b32"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7568e9e717e7540bd05bcc007f5d76fcaff3cdff"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b45b91db41379ee5fb36c187d6d7c37b725cbe8e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/bf98d7b0d5a99991e47e66cee4eb1d3fa514be97"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74634.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74634"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ring-buffer: Prevent subbuf order change when resizing is disabled"
}