driver: iio: add missing checks on iio_info's callback access

{
  "id": "e99ad0d1098263f156a21b332091b8a379acbf665f71c5ea12f9e1601cc8f15e",
  "url": "https://osv.dev/vulnerability/CVE-2024-46715",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "driver: iio: add missing checks on iio_info's callback access",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: driver: iio: add missing checks on iio_info's callback access Some callbacks from iio_info structure are accessed without any check, so if a driver doesn't implement them trying to access the corresponding sysfs entries produce a kernel oops such as: [ 2203.527791] Unable to handle kernel NULL pointer dereference at virtual address 00000000 when execute [...] [ 2203.783416] Call trace: [ 2203.783429] iio_read_channel_info_avail from dev_attr_show+0x18/0x48 [ 2203.789807] dev_attr_show from sysfs_kf_seq_show+0x90/0x120 [ 2203.794181] sysfs_kf_seq_show from seq_read_iter+0xd0/0x4e4 [ 2203.798555] seq_read_iter from vfs_read+0x238/0x2a0 [ 2203.802236] vfs_read from ksys_read+0xa4/0xd4 [ 2203.805385] ksys_read from ret_fast_syscall+0x0/0x54 [ 2203.809135] Exception stack(0xe0badfa8 to 0xe0badff0) [ 2203.812880] dfa0: 00000003 b6f10f80 00000003 b6eab000 00020000 00000000 [ 2203.819746] dfc0: 00000003 b6f10f80 7ff00000 00000003 00000003 00000000 00020000 00000000 [ 2203.826619] dfe0: b6e1bc88 bed80958 b6e1bc94 b6e1bcb0 [ 2203.830363] Code: bad PC value [ 2203.832695] ---[ end trace 0000000000000000 ]---",
    "evidence": "osv:CVE-2024-46715",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.203",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.109",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.50",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.10.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-46715",
      "aliases": [
        "CVE-2024-46715"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "51239600074bc9979b0a0e83b72c726d7dcc3132"
                },
                {
                  "fixed": "2b961d5786b4b31c367c719a2f918569b444c007"
                },
                {
                  "fixed": "0cc7e0ee31e5c44904e98e2229d591e093282a70"
                },
                {
                  "fixed": "72f022ebb9deac28663fa4c04ba315ed5d6654d1"
                },
                {
                  "fixed": "dc537a72f64890d883d24ae4ac58733fc5bc523d"
                },
                {
                  "fixed": "c4ec8dedca961db056ec85cb7ca8c9f7e2e92252"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46715.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.10.0"
                },
                {
                  "fixed": "5.15.203"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.109"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.50"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.10.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46715.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:38.520209939Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0cc7e0ee31e5c44904e98e2229d591e093282a70",
        "https://git.kernel.org/stable/c/2b961d5786b4b31c367c719a2f918569b444c007",
        "https://git.kernel.org/stable/c/72f022ebb9deac28663fa4c04ba315ed5d6654d1",
        "https://git.kernel.org/stable/c/c4ec8dedca961db056ec85cb7ca8c9f7e2e92252",
        "https://git.kernel.org/stable/c/dc537a72f64890d883d24ae4ac58733fc5bc523d",
        "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46715.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-46715",
        "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/2024/46xxx/CVE-2024-46715.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-46715",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 505518,
  "published_at": "2024-09-18T06:32:15.466+00:00"
}