{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "b98dba273a0e47dbfade89c9af73c5b012a4eabb"
            },
            {
              "fixed": "edf5fcd0469b7467bd5b37a79502c8d9c3257dbb"
            },
            {
              "fixed": "71c6b872c746465fa4b5def239cb296173ca8216"
            },
            {
              "fixed": "c2c0fb364685b8996c357d3b050394959b29d6e0"
            },
            {
              "fixed": "15cb16496446b94e67f7abcb049b8e2c75cd3d02"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "9c31bb2684f8035beca0275349d19d679b679ffb"
            },
            {
              "last_affected": "5fda50e262e65bd553ff777c4b280afd1495a18b"
            },
            {
              "last_affected": "557fda9ed70ebf8eda2620ba3d746215285a1303"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.15.129"
            },
            {
              "fixed": "5.16"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.1.50"
            },
            {
              "fixed": "6.2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.4.13"
            },
            {
              "fixed": "6.5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.5.0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89567.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\njbd2: bound shrinker scans by examined checkpoint buffers\n\nThe jbd2 shrinker currently accounts only checkpoint buffers that it\nsuccessfully releases against nr_to_scan.  Busy buffers therefore do not\nconsume the scan budget.\n\nIf a checkpoint transaction contains mostly busy buffers, the shrinker\ncan scan its entire checkpoint list while holding journal-\u003ej_list_lock.\nLarge checkpoint lists can result in excessive lock hold times and leave\nother CPUs spinning on j_list_lock, causing soft lockups or RCU stalls.\n\nPass nr_to_scan into journal_shrink_one_cp_list() and decrement it for\nevery buffer examined, including busy buffers.  Pass NULL from checkpoint\ncleanup paths so their existing full-list behavior is preserved.\n\nThis restores the scan-budget semantics that existed before\njournal_shrink_one_cp_list() was changed to always scan a complete\ncheckpoint list.",
  "id": "CVE-2026-89567",
  "modified": "2026-09-13T03:30:58.073018024Z",
  "published": "2026-09-11T19:44:37.332Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15cb16496446b94e67f7abcb049b8e2c75cd3d02"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/71c6b872c746465fa4b5def239cb296173ca8216"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c2c0fb364685b8996c357d3b050394959b29d6e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/edf5fcd0469b7467bd5b37a79502c8d9c3257dbb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89567.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89567"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "jbd2: bound shrinker scans by examined checkpoint buffers"
}