{
  "cveId": "CVE-2021-47090",
  "url": "https://patchblox.com/security/cve/CVE-2021-47090",
  "summary": "CVE-2021-47090 is fixed in 24 products on 1 platform, first by RHSA-2022:7683, released November 8, 2022. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  mm/hwpoison: clear MF_COUNT_INCREASED before ret...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()  Hulk Robot reported a panic in put_page_testzero() when testing madvise() with MADV_SOFT_OFFLINE.  The BUG() is triggered when retrying get_any_page().  This is because we keep MF_COUNT_INCREASED flag in second try but the refcnt is not increased.      page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)     ------------[ cut here ]------------     kernel BUG at include/linux/mm.h:737!     invalid opcode: 0000 [#1] PREEMPT SMP     CPU: 5 PID: 2135 Comm: sshd Tainted: G    B             5.16.0-rc6-dirty #373     Hardware name: QEMU Standard PC (i440FX \u002B PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014     RIP: release_pages\u002B0x53f/0x840     Call Trace:       free_pages_and_swap_cache\u002B0x64/0x80       tlb_flush_mmu\u002B0x6f/0x220       unmap_page_range\u002B0xe6c/0x12c0       unmap_single_vma\u002B0x90/0x170       unmap_vmas\u002B0xc4/0x180       exit_mmap\u002B0xde/0x3a0       mmput\u002B0xa3/0x250       do_exit\u002B0x564/0x1470       do_group_exit\u002B0x3b/0x100       __do_sys_exit_group\u002B0x13/0x20       __x64_sys_exit_group\u002B0x16/0x20       do_syscall_64\u002B0x34/0x80       entry_SYSCALL_64_after_hwframe\u002B0x44/0xae     Modules linked in:     ---[ end trace e99579b570fe0649 ]---     RIP: 0010:release_pages\u002B0x53f/0x840",
  "published": "2022-11-08T00:00:00Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00353,
  "epssPercentile": 0.29162,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-abi-stablelists",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-core",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-core",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-modules",
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      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-modules-extra",
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      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-doc",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
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      "fix": "RHSA-2022:7683",
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      "released": "2022-11-08T00:00:00Z"
    },
    {
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      "fix": "RHSA-2022:7683",
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      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-libs",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-libs-devel",
      "release": "RHEL 8",
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      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-zfcpdump",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-425.3.1.el8",
      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
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      "fix": "RHSA-2022:7683",
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    {
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      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
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    {
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      "fix": "RHSA-2022:7683",
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    },
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      "fix": "RHSA-2022:7683",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2022-7683",
      "released": "2022-11-08T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.15.15-1",
      "fix": "DEBIAN-CVE-2021-47090",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2021-47090",
      "released": "2024-03-04T18:15:07Z"
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      "release": "Debian 13.5 (trixie)",
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      "released": "2022-11-08T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}