{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2024-56661",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-56661",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-12-27T15:06:23.928Z",
    "updatedAt": "2026-05-11T20:56:48.403Z",
    "importedAt": "2026-10-24T01:57:20.494Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "tipc: fix NULL deref in cleanup_bearer()",
      "summary": "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",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4e69457f9dfae67435f3ccf29008768eae860415",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d1d4dfb189a115734bff81c411bc58d9e348db7d"
            },
            {
              "version": "650ee9a22d7a2de8999fac2d45983597a0c22359",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a771f349c95d3397636861a0a6462d4a7a7ecb25"
            },
            {
              "version": "d2a4894f238551eae178904e7f45af87577074fd",
              "status": "affected",
              "versionType": "git",
              "lessThan": "07b569eda6fe6a1e83be5a587abee12d1303f95e"
            },
            {
              "version": "d62d5180c036eeac09f80660edc7a602b369125f",
              "status": "affected",
              "versionType": "git",
              "lessThan": "754ec823ee53422361da7958a8c8bf3275426912"
            },
            {
              "version": "d00d4470bf8c4282617a3a10e76b20a9c7e4cffa",
              "status": "affected",
              "versionType": "git",
              "lessThan": "89ecda492d0a37fd00aaffc4151f1f44c26d93ac"
            },
            {
              "version": "e48b211c4c59062cb6dd6c2c37c51a7cc235a464",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a852c82eda4991e21610837aaa160965be71f5cc"
            },
            {
              "version": "6a2fa13312e51a621f652d522d7e2df7066330b6",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b04d86fff66b15c07505d226431f808c15b1703c"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5.4.287",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.4.288"
            },
            {
              "version": "5.10.231",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.10.232"
            },
            {
              "version": "5.15.174",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.15.175"
            },
            {
              "version": "6.1.120",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.121"
            },
            {
              "version": "6.6.66",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.67"
            },
            {
              "version": "6.12.5",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.6"
            }
          ]
        }
      ]
    }
  }
}