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        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
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        "summary": "Canonical URL",
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          "date": "2021-01-01T00:00:00Z",
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          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv4: fix memory leak in netlbl_cipsov4_add_std\n\nReported by syzkaller:\nBUG: memory leak\nunreferenced object 0xffff888105df7000 (size 64):\ncomm \"syz-executor842\", pid 360, jiffies 4294824824 (age 22.546s)\nhex dump (first 32 bytes):\n00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\nbacktrace:\n[<00000000e67ed558>] kmalloc include/linux/slab.h:590 [inline]\n[<00000000e67ed558>] kzalloc include/linux/slab.h:720 [inline]\n[<00000000e67ed558>] netlbl_cipsov4_add_std net/netlabel/netlabel_cipso_v4.c:145 [inline]\n[<00000000e67ed558>] netlbl_cipsov4_add+0x390/0x2340 net/netlabel/netlabel_cipso_v4.c:416\n[<0000000006040154>] genl_family_rcv_msg_doit.isra.0+0x20e/0x320 net/netlink/genetlink.c:739\n[<00000000204d7a1c>] genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]\n[<00000000204d7a1c>] genl_rcv_msg+0x2bf/0x4f0 net/netlink/genetlink.c:800\n[<00000000c0d6a995>] netlink_rcv_skb+0x134/0x3d0 net/netlink/af_netlink.c:2504\n[<00000000d78b9d2c>] genl_rcv+0x24/0x40 net/netlink/genetlink.c:811\n[<000000009733081b>] netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]\n[<000000009733081b>] netlink_unicast+0x4a0/0x6a0 net/netlink/af_netlink.c:1340\n[<00000000d5fd43b8>] netlink_sendmsg+0x789/0xc70 net/netlink/af_netlink.c:1929\n[<000000000a2d1e40>] sock_sendmsg_nosec net/socket.c:654 [inline]\n[<000000000a2d1e40>] sock_sendmsg+0x139/0x170 net/socket.c:674\n[<00000000321d1969>] ____sys_sendmsg+0x658/0x7d0 net/socket.c:2350\n[<00000000964e16bc>] ___sys_sendmsg+0xf8/0x170 net/socket.c:2404\n[<000000001615e288>] __sys_sendmsg+0xd3/0x190 net/socket.c:2433\n[<000000004ee8b6a5>] do_syscall_64+0x37/0x90 arch/x86/entry/common.c:47\n[<00000000171c7cee>] entry_SYSCALL_64_after_hwframe+0x44/0xae\n\nThe memory of doi_def->map.std pointing is allocated in\nnetlbl_cipsov4_add_std, but no place has freed it. It should be\nfreed in cipso_v4_doi_free which frees the cipso DOI resource.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "known_affected": [
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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2021-47250"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c",
          "url": "https://git.kernel.org/stable/c/086e92b1d68c6338535f715aad173f8cf4bfbc8c"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4",
          "url": "https://git.kernel.org/stable/c/0ffb460be3abac86f884a8c548bb02724ec370f4"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4",
          "url": "https://git.kernel.org/stable/c/212166510582631994be4f4b3fe15e10a03c1dd4"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1",
          "url": "https://git.kernel.org/stable/c/398a24447eb60f060c8994221cb5ae6caf355fa1"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66",
          "url": "https://git.kernel.org/stable/c/5340858147e3dc60913fb3dd0cbb758ec4a26e66"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f",
          "url": "https://git.kernel.org/stable/c/6dcea66d3bb519b426282588f38e884e07893c1f"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc",
          "url": "https://git.kernel.org/stable/c/d612c3f3fae221e7ea736d196581c2217304bbbc"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663",
          "url": "https://git.kernel.org/stable/c/deeeb65c6ee404f2d1fb80b38b2730645c0f4663"
        }
      ],
      "release_date": "2024-05-21T15:15:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-07-22T14:51:44.891190Z",
          "details": "This issue is a local-only memory leak in the CIPSOv4 NetLabel “add DOI” handler, affecting availability only and not confidentiality or integrity. Exploitation requires privileged generic netlink operations (GENL_ADMIN_PERM/CAP_NET_ADMIN) and the NetLabel CIPSOv4 subsystem to be explicitly configured; unprivileged users and remote actors cannot reach this code path in default configurations. At worst, a privileged operator could induce incremental kernel memory usage, and the bug was corrected upstream in 2021, making its practical risk low in managed enterprise deployments.",
          "product_ids": [
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      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
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      "threats": [
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          "category": "impact",
          "details": "Moderate"
        }
      ]
    }
  ]
}