{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-56661",
        "ASSIGNER": "cve@kernel.org",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix NULL deref in cleanup_bearer()\n\nsyzbot found [1] that after blamed commit, ub->ubsock->sk\nwas NULL when attempting the atomic_dec() :\n\natomic_dec(&tipc_net(sock_net(ub->ubsock->sk))->wq_count);\n\nFix this by caching the tipc_net pointer.\n\n[1]\n\nOops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN PTI\nKASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]\nCPU: 0 UID: 0 PID: 5896 Comm: kworker/0:3 Not tainted 6.13.0-rc1-next-20241203-syzkaller #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024\nWorkqueue: events cleanup_bearer\n RIP: 0010:read_pnet include/net/net_namespace.h:387 [inline]\n RIP: 0010:sock_net include/net/sock.h:655 [inline]\n RIP: 0010:cleanup_bearer+0x1f7/0x280 net/tipc/udp_media.c:820\nCode: 18 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 3c f7 99 f6 48 8b 1b 48 83 c3 30 e8 f0 e4 60 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 1a f7 99 f6 49 83 c7 e8 48 8b 1b\nRSP: 0018:ffffc9000410fb70 EFLAGS: 00010206\nRAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88802fe45a00\nRDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc9000410f900\nRBP: ffff88807e1f0908 R08: ffffc9000410f907 R09: 1ffff92000821f20\nR10: dffffc0000000000 R11: fffff52000821f21 R12: ffff888031d19980\nR13: dffffc0000000000 R14: dffffc0000000000 R15: ffff88807e1f0918\nFS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000556ca050b000 CR3: 0000000031c0c000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400"
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Linux",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Linux",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "4e69457f9dfae67435f3ccf29008768eae860415",
                                            "version_value": "d1d4dfb189a115734bff81c411bc58d9e348db7d"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "650ee9a22d7a2de8999fac2d45983597a0c22359",
                                            "version_value": "a771f349c95d3397636861a0a6462d4a7a7ecb25"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "d2a4894f238551eae178904e7f45af87577074fd",
                                            "version_value": "07b569eda6fe6a1e83be5a587abee12d1303f95e"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "d62d5180c036eeac09f80660edc7a602b369125f",
                                            "version_value": "754ec823ee53422361da7958a8c8bf3275426912"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "d00d4470bf8c4282617a3a10e76b20a9c7e4cffa",
                                            "version_value": "89ecda492d0a37fd00aaffc4151f1f44c26d93ac"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "e48b211c4c59062cb6dd6c2c37c51a7cc235a464",
                                            "version_value": "a852c82eda4991e21610837aaa160965be71f5cc"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "6a2fa13312e51a621f652d522d7e2df7066330b6",
                                            "version_value": "b04d86fff66b15c07505d226431f808c15b1703c"
                                        },
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "version": "6.13-rc2",
                                                        "status": "affected"
                                                    },
                                                    {
                                                        "version": "0",
                                                        "lessThan": "6.13-rc2",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.4.288",
                                                        "lessThanOrEqual": "5.4.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.10.232",
                                                        "lessThanOrEqual": "5.10.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "5.15.175",
                                                        "lessThanOrEqual": "5.15.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.1.121",
                                                        "lessThanOrEqual": "6.1.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.6.67",
                                                        "lessThanOrEqual": "6.6.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.12.6",
                                                        "lessThanOrEqual": "6.12.*",
                                                        "status": "unaffected",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "version": "6.13-rc3",
                                                        "lessThanOrEqual": "*",
                                                        "status": "unaffected",
                                                        "versionType": "original_commit_for_fix"
                                                    }
                                                ],
                                                "defaultStatus": "affected"
                                            }
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://git.kernel.org/stable/c/d1d4dfb189a115734bff81c411bc58d9e348db7d",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/d1d4dfb189a115734bff81c411bc58d9e348db7d"
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                "name": "https://git.kernel.org/stable/c/a771f349c95d3397636861a0a6462d4a7a7ecb25"
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                "url": "https://git.kernel.org/stable/c/07b569eda6fe6a1e83be5a587abee12d1303f95e",
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                "name": "https://git.kernel.org/stable/c/07b569eda6fe6a1e83be5a587abee12d1303f95e"
            },
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                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/754ec823ee53422361da7958a8c8bf3275426912"
            },
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                "name": "https://git.kernel.org/stable/c/89ecda492d0a37fd00aaffc4151f1f44c26d93ac"
            },
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                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/a852c82eda4991e21610837aaa160965be71f5cc"
            },
            {
                "url": "https://git.kernel.org/stable/c/b04d86fff66b15c07505d226431f808c15b1703c",
                "refsource": "MISC",
                "name": "https://git.kernel.org/stable/c/b04d86fff66b15c07505d226431f808c15b1703c"
            }
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    "generator": {
        "engine": "bippy-5f407fcff5a0"
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}