{
  "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-2023-53577",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-53577",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-10-04T15:17:16.632Z",
    "updatedAt": "2026-08-05T09:14:55.401Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "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": "bpf, cpumap: Make sure kthread is running before map update returns",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, cpumap: Make sure kthread is running before map update returns\n\nThe following warning was reported when running stress-mode enabled\nxdp_redirect_cpu with some RT threads:\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 4 PID: 65 at kernel/bpf/cpumap.c:135\n  CPU: 4 PID: 65 Comm: kworker/4:1 Not tainted 6.5.0-rc2+ #1\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)\n  Workqueue: events cpu_map_kthread_stop\n  RIP: 0010:put_cpu_map_entry+0xda/0x220\n  ......\n  Call Trace:\n   <TASK>\n   ? show_regs+0x65/0x70\n   ? __warn+0xa5/0x240\n   ......\n   ? put_cpu_map_entry+0xda/0x220\n   cpu_map_kthread_stop+0x41/0x60\n   process_one_work+0x6b0/0xb80\n   worker_thread+0x96/0x720\n   kthread+0x1a5/0x1f0\n   ret_from_fork+0x3a/0x70\n   ret_from_fork_asm+0x1b/0x30\n   </TASK>\n\nThe root cause is the same as commit 436901649731 (\"bpf: cpumap: Fix memory\nleak in cpu_map_update_elem\"). The kthread is stopped prematurely by\nkthread_stop() in cpu_map_kthread_stop(), and kthread() doesn't call\ncpu_map_kthread_run() at all but XDP program has already queued some\nframes or skbs into ptr_ring. So when __cpu_map_ring_cleanup() checks\nthe ptr_ring, it will find it was not emptied and report a warning.\n\nAn alternative fix is to use __cpu_map_ring_cleanup() to drop these\npending frames or skbs when kthread_stop() returns -EINTR, but it may\nconfuse the user, because these frames or skbs have been handled\ncorrectly by XDP program. So instead of dropping these frames or skbs,\njust make sure the per-cpu kthread is running before\n__cpu_map_entry_alloc() returns.\n\nAfter apply the fix, the error handle for kthread_stop() will be\nunnecessary because it will always return 0, so just remove it.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "6710e1126934d8b4372b4d2f9ae1646cd3f151bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b44d28b98f185d2f2348aa3c3636838c316f889e"
            },
            {
              "version": "6710e1126934d8b4372b4d2f9ae1646cd3f151bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7a1178a3671b40746830d355836b72e47ceb2490"
            },
            {
              "version": "6710e1126934d8b4372b4d2f9ae1646cd3f151bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ecb45b852af5e88257020b88bea5ff0798d72aca"
            },
            {
              "version": "6710e1126934d8b4372b4d2f9ae1646cd3f151bf",
              "status": "affected",
              "versionType": "git",
              "lessThan": "640a604585aa30f93e39b17d4d6ba69fcb1e66c9"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "5.15.126",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.45",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.4.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.4.*"
            },
            {
              "version": "6.5",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}