s390/iucv: MSG_PEEK causes memory leak in iucv_sock_destruct()

{
  "id": "4879b670a839494bfdfab851a37771496b9462dc7d700aa2acffd6f263e0d6fc",
  "url": "https://osv.dev/vulnerability/CVE-2024-53210",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "s390/iucv: MSG_PEEK causes memory leak in iucv_sock_destruct()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: s390/iucv: MSG_PEEK causes memory leak in iucv_sock_destruct() Passing MSG_PEEK flag to skb_recv_datagram() increments skb refcount (skb->users) and iucv_sock_recvmsg() does not decrement skb refcount at exit. This results in skb memory leak in skb_queue_purge() and WARN_ON in iucv_sock_destruct() during socket close. To fix this decrease skb refcount by one if MSG_PEEK is set in order to prevent memory leak and WARN_ON. WARNING: CPU: 2 PID: 6292 at net/iucv/af_iucv.c:286 iucv_sock_destruct+0x144/0x1a0 [af_iucv] CPU: 2 PID: 6292 Comm: afiucv_test_msg Kdump: loaded Tainted: G W 6.10.0-rc7 #1 Hardware name: IBM 3931 A01 704 (z/VM 7.3.0) Call Trace: [<001587c682c4aa98>] iucv_sock_destruct+0x148/0x1a0 [af_iucv] [<001587c682c4a9d0>] iucv_sock_destruct+0x80/0x1a0 [af_iucv] [<001587c704117a32>] __sk_destruct+0x52/0x550 [<001587c704104a54>] __sock_release+0xa4/0x230 [<001587c704104c0c>] sock_close+0x2c/0x40 [<001587c702c5f5a8>] __fput+0x2e8/0x970 [<001587c7024148c4>] task_work_run+0x1c4/0x2c0 [<001587c7023b0716>] do_exit+0x996/0x1050 [<001587c7023b13aa>] do_group_exit+0x13a/0x360 [<001587c7023b1626>] __s390x_sys_exit_group+0x56/0x60 [<001587c7022bccca>] do_syscall+0x27a/0x380 [<001587c7049a6a0c>] __do_syscall+0x9c/0x160 [<001587c7049ce8a8>] system_call+0x70/0x98 Last Breaking-Event-Address: [<001587c682c4a9d4>] iucv_sock_destruct+0x84/0x1a0 [af_iucv]",
    "evidence": "osv:CVE-2024-53210",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.120",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.64",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.11.11",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.2",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2024-53210",
      "aliases": [
        "CVE-2024-53210"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
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                  "introduced": "eac3731bd04c7131478722a3c148b78774553116"
                },
                {
                  "fixed": "934326aef7ac4652f81c69d18bf44eebaefc39c3"
                },
                {
                  "fixed": "42251c2d1ef1cb0822638bebb87ad9120c759673"
                },
                {
                  "fixed": "783c2c6e61c5a04eb8baea598753d5fa174dbe85"
                },
                {
                  "fixed": "9f603e66e1c59c1d25e60eb0636cb307d190782e"
                },
                {
                  "fixed": "ebaf81317e42aa990ad20b113cfe3a7b20d4e937"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-53210.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "2.6.21"
                },
                {
                  "fixed": "6.1.120"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.2.0"
                },
                {
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            {
              "type": "ECOSYSTEM",
              "events": [
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                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.11.11"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.12.0"
                },
                {
                  "fixed": "6.12.2"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-53210.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.913494120Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/42251c2d1ef1cb0822638bebb87ad9120c759673",
        "https://git.kernel.org/stable/c/783c2c6e61c5a04eb8baea598753d5fa174dbe85",
        "https://git.kernel.org/stable/c/934326aef7ac4652f81c69d18bf44eebaefc39c3",
        "https://git.kernel.org/stable/c/9f603e66e1c59c1d25e60eb0636cb307d190782e",
        "https://git.kernel.org/stable/c/ebaf81317e42aa990ad20b113cfe3a7b20d4e937",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/53xxx/CVE-2024-53210.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-53210",
        "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/2024/53xxx/CVE-2024-53210.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-53210",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504091,
  "published_at": "2024-12-27T13:49:56.183+00:00"
}