{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "376e242429bf8539ef39a080ac113c8799840b13"
            },
            {
              "fixed": "8f406205003f741225f620f0e357ca0de71d45e3"
            },
            {
              "fixed": "630ed8734a02b992e8a97538179c2ece42c5210f"
            },
            {
              "fixed": "518d9b5568bb06f86e4434f7a30faa9612ea91ad"
            },
            {
              "fixed": "5da247e4d1e8661d4d6f997101d59967e8994e32"
            },
            {
              "fixed": "6e62cf983a2bd547e6bbd3f935539233e5f97f8f"
            },
            {
              "fixed": "0c4256196b3a105307e2235fbfd85e768bbcdd0f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89988.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: Protect kprobe_blacklist with RCU\n\n__within_kprobe_blacklist() traverses kprobe_blacklist without holding\nkprobe_mutex. When a module is unloaded, kprobe_remove_area_blacklist()\nremoves blacklist entries and immediately frees them with kfree().\nA concurrent call to within_kprobe_blacklist() can therefore dereference\nfreed memory.\n\nFurthermore, within_kprobe_blacklist() can be called in atomic or\nnon-preemptible contexts where the sleeping kprobe_mutex cannot be taken.\n\nProtect kprobe_blacklist with RCU. Use guard(rcu)() and\nlist_for_each_entry_rcu() for traversal, list_add_tail_rcu() for\ninsertions, list_del_rcu() for deletions, and kfree_rcu() to reclaim\nentries safely after a grace period.",
  "id": "CVE-2026-89988",
  "modified": "2026-09-18T03:30:52.262360080Z",
  "published": "2026-09-16T10:33:03.003Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0c4256196b3a105307e2235fbfd85e768bbcdd0f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/518d9b5568bb06f86e4434f7a30faa9612ea91ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5da247e4d1e8661d4d6f997101d59967e8994e32"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/630ed8734a02b992e8a97538179c2ece42c5210f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e62cf983a2bd547e6bbd3f935539233e5f97f8f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8f406205003f741225f620f0e357ca0de71d45e3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89988.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89988"
    },
    {
      "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": "kprobes: Protect kprobe_blacklist with RCU"
}