bpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses

{
  "id": "d8bc78c5145978b761ce8a42b5fd9b0615c94f39b2843f8dda4330ddf13783c1",
  "url": "https://osv.dev/vulnerability/CVE-2024-43910",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bpf: add missing check_func_arg_reg_off() to prevent out-of-bounds memory accesses Currently, it's possible to pass in a modified CONST_PTR_TO_DYNPTR to a global function as an argument. The adverse effects of this is that BPF helpers can continue to make use of this modified CONST_PTR_TO_DYNPTR from within the context of the global function, which can unintentionally result in out-of-bounds memory accesses and therefore compromise overall system stability i.e. [ 244.157771] BUG: KASAN: slab-out-of-bounds in bpf_dynptr_data+0x137/0x140 [ 244.161345] Read of size 8 at addr ffff88810914be68 by task test_progs/302 [ 244.167151] CPU: 0 PID: 302 Comm: test_progs Tainted: G O E 6.10.0-rc3-00131-g66b586715063 #533 [ 244.174318] Call Trace: [ 244.175787] [ 244.177356] dump_stack_lvl+0x66/0xa0 [ 244.179531] print_report+0xce/0x670 [ 244.182314] ? __virt_addr_valid+0x200/0x3e0 [ 244.184908] kasan_report+0xd7/0x110 [ 244.187408] ? bpf_dynptr_data+0x137/0x140 [ 244.189714] ? bpf_dynptr_data+0x137/0x140 [ 244.192020] bpf_dynptr_data+0x137/0x140 [ 244.194264] bpf_prog_b02a02fdd2bdc5fa_global_call_bpf_dynptr_data+0x22/0x26 [ 244.198044] bpf_prog_b0fe7b9d7dc3abde_callback_adjust_bpf_dynptr_reg_off+0x1f/0x23 [ 244.202136] bpf_user_ringbuf_drain+0x2c7/0x570 [ 244.204744] ? 0xffffffffc0009e58 [ 244.206593] ? __pfx_bpf_user_ringbuf_drain+0x10/0x10 [ 244.209795] bpf_prog_33ab33f6a804ba2d_user_ringbuf_callback_const_ptr_to_dynptr_",
    "evidence": "osv:CVE-2024-43910",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.10.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2024-43910",
      "aliases": [
        "CVE-2024-43910"
      ],
      "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": [
                {
                  "introduced": "a64bfe618665ea9c722f922cba8c6e3234eac5ac"
                },
                {
                  "fixed": "13663a7c644bf1dedaf461d07252db5d76c8759a"
                },
                {
                  "fixed": "ec2b9a5e11e51fea1bb04c1e7e471952e887e874"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-43910.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.8.0"
                },
                {
                  "fixed": "6.10.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-43910.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.060131363Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/13663a7c644bf1dedaf461d07252db5d76c8759a",
        "https://git.kernel.org/stable/c/ec2b9a5e11e51fea1bb04c1e7e471952e887e874",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43910.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-43910",
        "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/2024/43xxx/CVE-2024-43910.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-43910",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 486978,
  "published_at": "2024-08-26T10:11:14.105+00:00"
}