{
  "fix": "RLSA-2021:4191",
  "url": "https://patchblox.com/security/fix/linux/rlsa-2021-4191",
  "summary": "RLSA-2021:4191, released November 9, 2021, fixes 7 CVEs across 15 products. None of them is reported as exploited. Patch Radar priority: Routine.",
  "platform": "linux",
  "type": "advisory",
  "title": "Security update for 15 packages",
  "released": "2021-11-09T08:35:34Z",
  "priority": "Routine",
  "priorityTier": 4,
  "priorityReason": "Closes 7 CVEs, none high severity",
  "supported": true,
  "cveCount": 7,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.01366,
  "maxCvss": 6.5,
  "vendorAdvisory": "https://errata.rockylinux.org/RLSA-2021:4191",
  "appliesTo": [
    {
      "product": "hivex",
      "productUrl": "https://patchblox.com/security/product/linux/hivex",
      "release": "rocky 8",
      "fixedVersion": "0:1.3.18-21.module\u002Bel8.4.0\u002B642\u002B7e26f5e1",
      "supported": true
    },
    {
      "product": "libguestfs",
      "productUrl": "https://patchblox.com/security/product/linux/libguestfs",
      "release": "rocky 8",
      "fixedVersion": "1:1.40.2-28.module\u002Bel8.5.0\u002B670\u002Bc4aa478c",
      "supported": true
    },
    {
      "product": "libguestfs-winsupport",
      "productUrl": "https://patchblox.com/security/product/linux/libguestfs-winsupport",
      "release": "rocky 8",
      "fixedVersion": "0:8.2-1.module\u002Bel8.4.0\u002B534\u002B4680a14e",
      "supported": true
    },
    {
      "product": "libiscsi",
      "productUrl": "https://patchblox.com/security/product/linux/libiscsi",
      "release": "rocky 8",
      "fixedVersion": "0:1.18.0-8.module\u002Bel8.7.0\u002B1084\u002B97b81f61",
      "supported": true
    },
    {
      "product": "libnbd",
      "productUrl": "https://patchblox.com/security/product/linux/libnbd",
      "release": "rocky 8",
      "fixedVersion": "0:1.2.2-1.module\u002Bel8.4.0\u002B534\u002B4680a14e",
      "supported": true
    },
    {
      "product": "libvirt",
      "productUrl": "https://patchblox.com/security/product/linux/libvirt",
      "release": "rocky 8",
      "fixedVersion": "0:6.0.0-37.module\u002Bel8.5.0\u002B670\u002Bc4aa478c",
      "supported": true
    },
    {
      "product": "libvirt-dbus",
      "productUrl": "https://patchblox.com/security/product/linux/libvirt-dbus",
      "release": "rocky 8",
      "fixedVersion": "0:1.3.0-2.module\u002Bel8.7.0\u002B1084\u002B97b81f61",
      "supported": true
    },
    {
      "product": "libvirt-python",
      "productUrl": "https://patchblox.com/security/product/linux/libvirt-python",
      "release": "rocky 8",
      "fixedVersion": "0:6.0.0-1.module\u002Bel8.4.0\u002B534\u002B4680a14e",
      "supported": true
    },
    {
      "product": "nbdkit",
      "productUrl": "https://patchblox.com/security/product/linux/nbdkit",
      "release": "rocky 8",
      "fixedVersion": "0:1.16.2-4.module\u002Bel8.4.0\u002B534\u002B4680a14e",
      "supported": true
    },
    {
      "product": "netcf",
      "productUrl": "https://patchblox.com/security/product/linux/netcf",
      "release": "rocky 8",
      "fixedVersion": "0:0.2.8-12.module\u002Bel8.7.0\u002B1084\u002B97b81f61",
      "supported": true
    },
    {
      "product": "perl-Sys-Virt",
      "productUrl": "https://patchblox.com/security/product/linux/perl-sys-virt",
      "release": "rocky 8",
      "fixedVersion": "0:6.0.0-1.module\u002Bel8.4.0\u002B534\u002B4680a14e",
      "supported": true
    },
    {
      "product": "qemu-kvm",
      "productUrl": "https://patchblox.com/security/product/linux/qemu-kvm",
      "release": "rocky 8",
      "fixedVersion": "5:4.2.0-59.module\u002Bel8.5.0\u002B670\u002Bc4aa478c",
      "supported": true
    },
    {
      "product": "seabios",
      "productUrl": "https://patchblox.com/security/product/linux/seabios",
      "release": "rocky 8",
      "fixedVersion": "0:1.13.0-2.module\u002Bel8.4.0\u002B534\u002B4680a14e",
      "supported": true
    },
    {
      "product": "sgabios",
      "productUrl": "https://patchblox.com/security/product/linux/sgabios",
      "release": "rocky 8",
      "fixedVersion": "1:0.20170427git-3.module\u002Bel8.7.0\u002B1084\u002B97b81f61",
      "supported": true
    },
    {
      "product": "supermin",
      "productUrl": "https://patchblox.com/security/product/linux/supermin",
      "release": "rocky 8",
      "fixedVersion": "0:5.1.19-10.module\u002Bel8.4.0\u002B534\u002B4680a14e",
      "supported": true
    }
  ],
  "cves": [
    {
      "cveId": "CVE-2021-3667",
      "url": "https://patchblox.com/security/cve/CVE-2021-3667",
      "title": "hivex: Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 6.5,
      "epss": 0.01366,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-3631",
      "url": "https://patchblox.com/security/cve/CVE-2021-3631",
      "title": "libnss-libvirt: A flaw was found in libvirt while it generates SELinux MCS category pairsfor VMs\u0027 dynamic labels",
      "priority": "Routine",
      "severity": "Negligible",
      "cvss": 6.5,
      "epss": 0.00493,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2020-15859",
      "url": "https://patchblox.com/security/cve/CVE-2020-15859",
      "title": "hivex: Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms",
      "priority": "Routine",
      "severity": "Moderate",
      "cvss": 6.5,
      "epss": 0.0044,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-3592",
      "url": "https://patchblox.com/security/cve/CVE-2021-3592",
      "title": "libslirp0: An invalid pointer initialization issue was found in the SLiRP networkingimplementation of QEMU",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 6.5,
      "epss": 0.00326,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-3593",
      "url": "https://patchblox.com/security/cve/CVE-2021-3593",
      "title": "libslirp0: An invalid pointer initialization issue was found in the SLiRP networkingimplementation of QEMU",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 6.5,
      "epss": 0.00326,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-3594",
      "url": "https://patchblox.com/security/cve/CVE-2021-3594",
      "title": "libslirp0: An invalid pointer initialization issue was found in the SLiRP networkingimplementation of QEMU",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 6.5,
      "epss": 0.00326,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2021-3595",
      "url": "https://patchblox.com/security/cve/CVE-2021-3595",
      "title": "libslirp0: An invalid pointer initialization issue was found in the SLiRP networkingimplementation of QEMU",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 6.5,
      "epss": 0.00326,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}