{
  "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-2021-47014",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47014",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-02-28T08:13:31.513Z",
    "updatedAt": "2026-08-05T08:45:35.578Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "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": "net/sched: act_ct: fix wild memory access when clearing fragments",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_ct: fix wild memory access when clearing fragments\n\nwhile testing re-assembly/re-fragmentation using act_ct, it's possible to\nobserve a crash like the following one:\n\n KASAN: maybe wild-memory-access in range [0x0001000000000448-0x000100000000044f]\n CPU: 50 PID: 0 Comm: swapper/50 Tainted: G S                5.12.0-rc7+ #424\n Hardware name: Dell Inc. PowerEdge R730/072T6D, BIOS 2.4.3 01/17/2017\n RIP: 0010:inet_frag_rbtree_purge+0x50/0xc0\n Code: 00 fc ff df 48 89 c3 31 ed 48 89 df e8 a9 7a 38 ff 4c 89 fe 48 89 df 49 89 c6 e8 5b 3a 38 ff 48 8d 7b 40 48 89 f8 48 c1 e8 03 <42> 80 3c 20 00 75 59 48 8d bb d0 00 00 00 4c 8b 6b 40 48 89 f8 48\n RSP: 0018:ffff888c31449db8 EFLAGS: 00010203\n RAX: 0000200000000089 RBX: 000100000000040e RCX: ffffffff989eb960\n RDX: 0000000000000140 RSI: ffffffff97cfb977 RDI: 000100000000044e\n RBP: 0000000000000900 R08: 0000000000000000 R09: ffffed1186289350\n R10: 0000000000000003 R11: ffffed1186289350 R12: dffffc0000000000\n R13: 000100000000040e R14: 0000000000000000 R15: ffff888155e02160\n FS:  0000000000000000(0000) GS:ffff888c31440000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00005600cb70a5b8 CR3: 0000000a2c014005 CR4: 00000000003706e0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n  <IRQ>\n  inet_frag_destroy+0xa9/0x150\n  call_timer_fn+0x2d/0x180\n  run_timer_softirq+0x4fe/0xe70\n  __do_softirq+0x197/0x5a0\n  irq_exit_rcu+0x1de/0x200\n  sysvec_apic_timer_interrupt+0x6b/0x80\n  </IRQ>\n\nwhen act_ct temporarily stores an IP fragment, restoring the skb qdisc cb\nresults in putting random data in FRAG_CB(), and this causes those \"wild\"\nmemory accesses later, when the rbtree is purged. Never overwrite the skb\ncb in case tcf_ct_handle_fragments() returns -EINPROGRESS.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ae372cb1750f6c95370f92fe5f5620e0954663ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0648941f4c8bbf8b4b6c0b270889ae7aa769b921"
            },
            {
              "version": "ae372cb1750f6c95370f92fe5f5620e0954663ba",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f77bd544a6bbe69aa50d9ed09f13494cf36ff806"
            },
            {
              "version": "fbff97eb6f4a94a3f15f685bed604c9adc29ac3e",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "5.7.12",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "5.8"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.8"
            },
            {
              "version": "5.12.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.12.*"
            },
            {
              "version": "5.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}