{
  "cveId": "CVE-2021-3543",
  "url": "https://patchblox.com/security/cve/CVE-2021-3543",
  "summary": "CVE-2021-3543 is fixed in 37 products on 1 platform, first by RHSA-2021:2168, released June 1, 2021. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "bpftool: The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: u...",
  "description": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: userspace applications can misuse the KVM API to cause a write of 16 bytes at an offset up to 32 GB from vcpu-\u003Erun (CVE-2021-3501)\n\n* kernel: nitro_enclaves stale file descriptors on failed usercopy (CVE-2021-3543)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nBug Fix(es):\n\n* OVS mistakenly using local IP as tun_dst for VXLAN packets (?) (BZ#1944667)\n\n* Selinux: The task calling security_set_bools() deadlocks with itself when it later calls  selinux_audit_rule_match(). (BZ#1945123)\n\n* [mlx5] tc flower mpls match options does not work (BZ#1952061)\n\n* mlx5: missing patches for ct.rel (BZ#1952062)\n\n* CT HWOL: with OVN/OVS, intermittently, load balancer hairpin TCP packets get dropped for seconds in a row (BZ#1952065)\n\n* [Lenovo 8.3 bug] Blackscreen after clicking on \u0022Settings\u0022 icon from top-right corner. (BZ#1952900)\n\n* RHEL 8.x missing uio upstream fix. (BZ#1952952)\n\n* Turbostat doesn\u0027t show any measured data on AMD Milan (BZ#1952987)\n\n* P620 no sound from front headset jack (BZ#1954545)\n\n* RHEL kernel 8.2 and higher are affected by data corruption bug in raid1 arrays using bitmaps. (BZ#1955188)\n\n* [net/sched] connection failed with DNAT \u002B SNAT by tc action ct (BZ#1956458)",
  "published": "2021-06-01T00:00:00Z",
  "severity": "Important",
  "cvss": 6.7,
  "epss": 0.00301,
  "epssPercentile": 0.2302,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "bpftool",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-abi-stablelists",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-abi-stablelists",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-core",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-core",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-cross-headers",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-core",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-core",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-devel",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-modules",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-modules",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-modules-extra",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-debug-modules-extra",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-devel",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-doc",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-doc",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-headers",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules-extra",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-modules-extra",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-core",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-debug",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-debug-core",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-debug-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-debug-kvm",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-debug-modules",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-debug-modules-extra",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-kvm",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-modules",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-rt-modules-extra",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.rt7.75.el8_4",
      "fix": "RHSA-2021:2169",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2169",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-libs",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-libs",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-libs-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-tools-libs-devel",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-zfcpdump",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-zfcpdump-core",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-zfcpdump-devel",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-zfcpdump-modules",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "kernel-zfcpdump-modules-extra",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "perf",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf",
      "release": "RHEL 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "RHSA-2021:2168",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2021-2168",
      "released": "2021-06-01T00:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-perf",
      "release": "ol 8",
      "fixedVersion": "0:4.18.0-305.3.1.el8_4",
      "fix": "ELSA-2021-2168",
      "url": "https://patchblox.com/security/fix/linux/elsa-2021-2168",
      "released": "2021-06-02T00:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}