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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.",
        "title": "Terms of Use"
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        "category": "self",
        "summary": "Canonical URL",
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          "date": "2021-01-01T00:00:00Z",
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          "date": "2026-08-25T12:55:48Z",
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          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_limit: avoid possible divide error in nft_limit_init\n\ndiv_u64() divides u64 by u32.\n\nnft_limit_init() wants to divide u64 by u64, use the appropriate\nmath function (div64_u64)\n\ndivide error: 0000 [#1] PREEMPT SMP KASAN\nCPU: 1 PID: 8390 Comm: syz-executor188 Not tainted 5.12.0-rc4-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011\nRIP: 0010:div_u64_rem include/linux/math64.h:28 [inline]\nRIP: 0010:div_u64 include/linux/math64.h:127 [inline]\nRIP: 0010:nft_limit_init+0x2a2/0x5e0 net/netfilter/nft_limit.c:85\nCode: ef 4c 01 eb 41 0f 92 c7 48 89 de e8 38 a5 22 fa 4d 85 ff 0f 85 97 02 00 00 e8 ea 9e 22 fa 4c 0f af f3 45 89 ed 31 d2 4c 89 f0 <49> f7 f5 49 89 c6 e8 d3 9e 22 fa 48 8d 7d 48 48 b8 00 00 00 00 00\nRSP: 0018:ffffc90009447198 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000200000000000 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: ffffffff875152e6 RDI: 0000000000000003\nRBP: ffff888020f80908 R08: 0000200000000000 R09: 0000000000000000\nR10: ffffffff875152d8 R11: 0000000000000000 R12: ffffc90009447270\nR13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\nFS:  000000000097a300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00000000200001c4 CR3: 0000000026a52000 CR4: 00000000001506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n nf_tables_newexpr net/netfilter/nf_tables_api.c:2675 [inline]\n nft_expr_init+0x145/0x2d0 net/netfilter/nf_tables_api.c:2713\n nft_set_elem_expr_alloc+0x27/0x280 net/netfilter/nf_tables_api.c:5160\n nf_tables_newset+0x1997/0x3150 net/netfilter/nf_tables_api.c:4321\n nfnetlink_rcv_batch+0x85a/0x21b0 net/netfilter/nfnetlink.c:456\n nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:580 [inline]\n nfnetlink_rcv+0x3af/0x420 net/netfilter/nfnetlink.c:598\n netlink_unicast_kernel net/netlink/af_netlink.c:1312 [inline]\n netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1338\n netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1927\n sock_sendmsg_nosec net/socket.c:654 [inline]\n sock_sendmsg+0xcf/0x120 net/socket.c:674\n ____sys_sendmsg+0x6e8/0x810 net/socket.c:2350\n ___sys_sendmsg+0xf3/0x170 net/socket.c:2404\n __sys_sendmsg+0xe5/0x1b0 net/socket.c:2433\n do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46\n entry_SYSCALL_64_after_hwframe+0x44/0xae",
          "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-2021-46915"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/01fb1626b620cb37a65ad08e0f626489e8f042ef",
          "url": "https://git.kernel.org/stable/c/01fb1626b620cb37a65ad08e0f626489e8f042ef"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/1bb3ee4259936cc3b2d80a4a480bbb4868575071",
          "url": "https://git.kernel.org/stable/c/1bb3ee4259936cc3b2d80a4a480bbb4868575071"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/9065ccb9ec92c5120e7e97958397ebdb454f23d6",
          "url": "https://git.kernel.org/stable/c/9065ccb9ec92c5120e7e97958397ebdb454f23d6"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/b895bdf5d643b6feb7c60856326dd4feb6981560",
          "url": "https://git.kernel.org/stable/c/b895bdf5d643b6feb7c60856326dd4feb6981560"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/dc1732baa9da5b68621586bf8636ebbc27dc62d2",
          "url": "https://git.kernel.org/stable/c/dc1732baa9da5b68621586bf8636ebbc27dc62d2"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/fadd3c4afdf3d4c21f4d138502f8b76334987e26",
          "url": "https://git.kernel.org/stable/c/fadd3c4afdf3d4c21f4d138502f8b76334987e26"
        }
      ],
      "release_date": "2024-02-27T07:15:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-07-22T14:52:13.764963Z",
          "details": "This is a local-only DoS in the nftables “limit” expression that is triggered during rule initialization and requires the ability to configure nftables via the nfnetlink API (CAP_NET_ADMIN in the target namespace). It has no confidentiality or integrity impact, and the code path is only reachable when creating nft_limit rules—systems without such rules are not exposed. The bug was corrected upstream in Linux 5.11.16 and has been broadly backported, so residual risk for maintained enterprise servers/VMs is minimal.",
          "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"
          },
          "products": [
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      "threats": [
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          "category": "impact",
          "details": "Moderate"
        }
      ]
    }
  ]
}