{
  "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-2024-56613",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-56613",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-12-27T14:51:18.068Z",
    "updatedAt": "2026-05-11T20:55:51.104Z",
    "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": "sched/numa: fix memory leak due to the overwritten vma->numab_state",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nsched/numa: fix memory leak due to the overwritten vma->numab_state\n\n[Problem Description]\nWhen running the hackbench program of LTP, the following memory leak is\nreported by kmemleak.\n\n  # /opt/ltp/testcases/bin/hackbench 20 thread 1000\n  Running with 20*40 (== 800) tasks.\n\n  # dmesg | grep kmemleak\n  ...\n  kmemleak: 480 new suspected memory leaks (see /sys/kernel/debug/kmemleak)\n  kmemleak: 665 new suspected memory leaks (see /sys/kernel/debug/kmemleak)\n\n  # cat /sys/kernel/debug/kmemleak\n  unreferenced object 0xffff888cd8ca2c40 (size 64):\n    comm \"hackbench\", pid 17142, jiffies 4299780315\n    hex dump (first 32 bytes):\n      ac 74 49 00 01 00 00 00 4c 84 49 00 01 00 00 00  .tI.....L.I.....\n      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................\n    backtrace (crc bff18fd4):\n      [<ffffffff81419a89>] __kmalloc_cache_noprof+0x2f9/0x3f0\n      [<ffffffff8113f715>] task_numa_work+0x725/0xa00\n      [<ffffffff8110f878>] task_work_run+0x58/0x90\n      [<ffffffff81ddd9f8>] syscall_exit_to_user_mode+0x1c8/0x1e0\n      [<ffffffff81dd78d5>] do_syscall_64+0x85/0x150\n      [<ffffffff81e0012b>] entry_SYSCALL_64_after_hwframe+0x76/0x7e\n  ...\n\nThis issue can be consistently reproduced on three different servers:\n  * a 448-core server\n  * a 256-core server\n  * a 192-core server\n\n[Root Cause]\nSince multiple threads are created by the hackbench program (along with\nthe command argument 'thread'), a shared vma might be accessed by two or\nmore cores simultaneously. When two or more cores observe that\nvma->numab_state is NULL at the same time, vma->numab_state will be\noverwritten.\n\nAlthough current code ensures that only one thread scans the VMAs in a\nsingle 'numa_scan_period', there might be a chance for another thread\nto enter in the next 'numa_scan_period' while we have not gotten till\nnumab_state allocation [1].\n\nNote that the command `/opt/ltp/testcases/bin/hackbench 50 process 1000`\ncannot the reproduce the issue. It is verified with 200+ test runs.\n\n[Solution]\nUse the cmpxchg atomic operation to ensure that only one thread executes\nthe vma->numab_state assignment.\n\n[1] https://lore.kernel.org/lkml/1794be3c-358c-4cdc-a43d-a1f841d91ef7@amd.com/",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ef6a22b70f6d90449a5c797b8968a682824e2011",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8f149bcc4d91ac92b32ff4949b291e6ed883dc42"
            },
            {
              "version": "ef6a22b70f6d90449a5c797b8968a682824e2011",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a71ddd5b87cda687efa28e049e85e923689bcef9"
            },
            {
              "version": "ef6a22b70f6d90449a5c797b8968a682824e2011",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5f1b64e9a9b7ee9cfd32c6b2fab796e29bfed075"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.4",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.4"
            },
            {
              "version": "6.6.66",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}