{
  "threat_severity" : "Low",
  "public_date" : "2021-03-01T00:00:00Z",
  "bugzilla" : {
    "description" : "libnbd: Assertion failure in nbd_unlocked_opt_go in lib/opt.c",
    "id" : "1934727",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1934727"
  },
  "cvss3" : {
    "cvss3_base_score" : "2.7",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L",
    "status" : "draft"
  },
  "cwe" : "CWE-617",
  "details" : [ "A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go in ilb/opt.c may lead to denial of service.", "A flaw was found in libnbd. A malicious server may be able to kill a client application using libnbd due to an assertion failure in nbd_unlocked_opt_go() leading to denial of service. The highest threat from this vulnerability is to system availability." ],
  "statement" : "Red Hat Enterprise Linux 8 is not affected by this issue. The affected API was introduced in upstream `libnbd` version 1.4 which is only shipped in RHEL Advanced Virtualization 8.3.0 onward.",
  "acknowledgement" : "This issue was discovered by Eric Blake (Red Hat).",
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "virt:rhel/libnbd",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8 Advanced Virtualization",
    "fix_state" : "Not affected",
    "package_name" : "virt:8.2/libnbd",
    "cpe" : "cpe:/a:redhat:advanced_virtualization:8::el8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8 Advanced Virtualization",
    "fix_state" : "Fix deferred",
    "package_name" : "virt:8.3/libnbd",
    "cpe" : "cpe:/a:redhat:advanced_virtualization:8::el8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8 Advanced Virtualization",
    "fix_state" : "Affected",
    "package_name" : "virt:av/libnbd",
    "cpe" : "cpe:/a:redhat:advanced_virtualization:8::el8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "libnbd",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2021-20286\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-20286" ],
  "name" : "CVE-2021-20286",
  "csaw" : false
}