ftrace: Fix possible use-after-free issue in ftrace_location()

{
  "id": "f9adf48573bfe4c6049db4bc414483edff189e676acaef3214dd2af5f365aefb",
  "url": "https://osv.dev/vulnerability/CVE-2024-38588",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ftrace: Fix possible use-after-free issue in ftrace_location()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix possible use-after-free issue in ftrace_location() KASAN reports a bug: BUG: KASAN: use-after-free in ftrace_location+0x90/0x120 Read of size 8 at addr ffff888141d40010 by task insmod/424 CPU: 8 PID: 424 Comm: insmod Tainted: G W 6.9.0-rc2+ [...] Call Trace: dump_stack_lvl+0x68/0xa0 print_report+0xcf/0x610 kasan_report+0xb5/0xe0 ftrace_location+0x90/0x120 register_kprobe+0x14b/0xa40 kprobe_init+0x2d/0xff0 [kprobe_example] do_one_initcall+0x8f/0x2d0 do_init_module+0x13a/0x3c0 load_module+0x3082/0x33d0 init_module_from_file+0xd2/0x130 __x64_sys_finit_module+0x306/0x440 do_syscall_64+0x68/0x140 entry_SYSCALL_64_after_hwframe+0x71/0x79 The root cause is that, in lookup_rec(), ftrace record of some address is being searched in ftrace pages of some module, but those ftrace pages at the same time is being freed in ftrace_release_mod() as the corresponding module is being deleted: CPU1 | CPU2 register_kprobes() { | delete_module() { check_kprobe_address_safe() { | arch_check_ftrace_location() { | ftrace_location() { | lookup_rec() // USE! | ftrace_release_mod() // Free! To fix this issue: 1. Hold rcu lock as accessing ftrace pages in ftrace_location_range(); 2. Use ftrace_location_range() instead of lookup_rec() in ftrace_location(); 3. Call synchronize_rcu() before freeing any ftrace pages both in ftrace_process_locs()/ftrace_release_mod()/ftrace_free_mem().",
    "evidence": "osv:CVE-2024-38588",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.286",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.227",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.162",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.93",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.33",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.8.12",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.9.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-38588",
      "aliases": [
        "CVE-2024-38588"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                },
                {
                  "fixed": "eea46baf145150910ba134f75a67106ba2222c1b"
                },
                {
                  "fixed": "1880a324af1c95940a7c954b6b937e86844a33bd"
                },
                {
                  "fixed": "8ea8ef5e42173560ac510e92a1cc797ffeea8831"
                },
                {
                  "fixed": "dbff5f0bfb2416b8b55c105ddbcd4f885e98fada"
                },
                {
                  "fixed": "7b4881da5b19f65709f5c18c1a4d8caa2e496461"
                },
                {
                  "fixed": "66df065b3106964e667b37bf8f7e55ec69d0c1f6"
                },
                {
                  "fixed": "31310e373f4c8c74e029d4326b283e757edabc0b"
                },
                {
                  "fixed": "e60b613df8b6253def41215402f72986fee3fc8d"
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              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-38588.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.7.0"
                },
                {
                  "fixed": "5.4.286"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
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                {
                  "fixed": "5.10.227"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.162"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.93"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.33"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.8.12"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.9.0"
                },
                {
                  "fixed": "6.9.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-38588.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.175811086Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1880a324af1c95940a7c954b6b937e86844a33bd",
        "https://git.kernel.org/stable/c/31310e373f4c8c74e029d4326b283e757edabc0b",
        "https://git.kernel.org/stable/c/66df065b3106964e667b37bf8f7e55ec69d0c1f6",
        "https://git.kernel.org/stable/c/7b4881da5b19f65709f5c18c1a4d8caa2e496461",
        "https://git.kernel.org/stable/c/8ea8ef5e42173560ac510e92a1cc797ffeea8831",
        "https://git.kernel.org/stable/c/dbff5f0bfb2416b8b55c105ddbcd4f885e98fada",
        "https://git.kernel.org/stable/c/e60b613df8b6253def41215402f72986fee3fc8d",
        "https://git.kernel.org/stable/c/eea46baf145150910ba134f75a67106ba2222c1b",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38588.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-38588",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/38xxx/CVE-2024-38588.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-38588",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518220,
  "published_at": "2024-06-19T13:37:43.262+00:00"
}