{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7c7e3d31e7856a8260a254f8c71db416f7f9f5a1"
            },
            {
              "fixed": "db347840d6b6ee9bb9b8e4a985d4b4419f9f3200"
            },
            {
              "fixed": "8e1101fc4118019a69c96ced4aec93164f89cbd5"
            },
            {
              "fixed": "c7ad910e987008e125eeff448892e86852173384"
            },
            {
              "fixed": "86d54cf069fc5ae2e111c87933bebf6eb527978e"
            },
            {
              "fixed": "2b2a903bee56d312539046d9defa8023eec94760"
            },
            {
              "fixed": "47b079e2117a2ee52e21f8b72935900c702fc0b5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.17.0"
            },
            {
              "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": "6.18.52"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93137.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix use-after-free on mm_struct in bpf_find_vma()\n\nbpf_find_vma() reads task-\u003emm and calls mmap_read_trylock(mm) without\nholding a reference on the mm. On a foreign task, a concurrent exit_mm()\ncan free the mm_struct between the lockless read and the trylock,\nresulting in a use-after-free. mm_struct is not SLAB_TYPESAFE_BY_RCU.\n\nFor the current task, task-\u003emm is stable. For a foreign task, pin the mm\nunder task-\u003ealloc_lock and release it with mmput_async(), mirroring commit\nd8e27d2d22b6 (\"bpf: fix mm lifecycle in open-coded task_vma iterator\").\nUse spin_trylock() instead of get_task_mm() so BPF context does not block\non alloc_lock. Reject irqs-disabled contexts and !CONFIG_MMU on the\nforeign-task path because dropping the mm reference is not safe there.\n\nRace:\n\n  CPU0 (BPF program)                  CPU1 (exiting task)\n  ============================        ==========================\n  bpf_find_vma(foreign_task):\n    mm = task-\u003emm\n                                      exit_mm():\n                                        task-\u003emm = NULL\n                                        mmput(mm) -\u003e frees mm_struct\n    mmap_read_trylock(mm)\n        // UAF on mm",
  "id": "CVE-2026-93137",
  "modified": "2026-09-19T03:30:55.439162774Z",
  "published": "2026-09-17T16:11:38.135Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b2a903bee56d312539046d9defa8023eec94760"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/47b079e2117a2ee52e21f8b72935900c702fc0b5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86d54cf069fc5ae2e111c87933bebf6eb527978e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e1101fc4118019a69c96ced4aec93164f89cbd5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7ad910e987008e125eeff448892e86852173384"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/db347840d6b6ee9bb9b8e4a985d4b4419f9f3200"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93137.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93137"
    },
    {
      "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": "bpf: Fix use-after-free on mm_struct in bpf_find_vma()"
}