{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "818e0084822742fc00eacbf5df3476a5e72c7d0e"
            },
            {
              "fixed": "94f41ec5fa578765b74ad5736c2f029e7aabc46d"
            },
            {
              "fixed": "de020dc8049bfb2b22e3b6d99c031feb2e22d112"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.2.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98787.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix missing migration protection in __rhtab_map_lookup_and_delete_batch()\n\nbpf_mem_cache_free_rcu() uses this_cpu_ptr() which requires migration\nto be disabled. All callers of rhtab_delete_elem() disable migration\nexcept __rhtab_map_lookup_and_delete_batch(), which calls it under\nrcu_read_lock() only.\n\nOn CONFIG_PREEMPT_RCU, rcu_read_lock() does not disable preemption or\nmigration, so the task can migrate between CPUs during the delete loop,\ncausing this_cpu_ptr() to trigger:\n\n  BUG: using smp_processor_id() in preemptible [00000000] code\n\nFix by wrapping the delete loop in migrate_disable()/migrate_enable()\nin __rhtab_map_lookup_and_delete_batch(), matching the migration\nprotection that the other callers already provide.",
  "id": "CVE-2026-98787",
  "modified": "2026-10-20T02:30:14.845810911Z",
  "published": "2026-10-18T15:48:23.947Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94f41ec5fa578765b74ad5736c2f029e7aabc46d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/de020dc8049bfb2b22e3b6d99c031feb2e22d112"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98787.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98787"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "bpf: Fix missing migration protection in __rhtab_map_lookup_and_delete_batch()"
}