{
  "threat_severity" : "Important",
  "public_date" : "2021-02-05T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c",
    "id" : "1925588",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1925588"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.8",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-362",
  "details" : [ "A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.", "A flaw was found in the Linux kernel. Wrong locking in the AF_VSOCK socket can cause a local privilege escalation, bypassing SMEP and SMAP. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability." ],
  "statement" : "This issue does affect the Red Hat Enterprise Linux 8 kernel versions kernel-4.18.0-240 onwards, starting with Red Hat Enterprise Linux 8.3 GA, which introduced VSOCK multi-transport support. Prior Red Hat Enterprise Linux kernel versions are not affected by this issue.",
  "acknowledgement" : "Red Hat would like to thank Alexander Popov for reporting this issue.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2021-04-06T00:00:00Z",
    "advisory" : "RHSA-2021:1081",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-240.22.1.rt7.77.el8_3"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2021-04-06T00:00:00Z",
    "advisory" : "RHSA-2021:1093",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-240.22.1.el8_3"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-alt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2021-26708\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-26708\nhttps://www.openwall.com/lists/oss-security/2021/02/04/5" ],
  "name" : "CVE-2021-26708",
  "csaw" : false
}