{
  "threat_severity" : "Moderate",
  "public_date" : "2022-07-12T09:00:00Z",
  "bugzilla" : {
    "description" : "hw: cpu: AMD: IBPB and Return Address Predictor Interactions",
    "id" : "2119127",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2119127"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.6",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
    "status" : "draft"
  },
  "cwe" : "CWE-1037",
  "details" : [ "IBPB may not prevent return branch predictions from being specified by pre-IBPB branch targets leading to a potential information disclosure.", "A flaw was found in hw. The AMD CPUs can be attacked similar to the previously known Spectre Variant 2 (CVE-2017-5715). This issue affects AMD CPUs where the OS relies on IBPB to flush the return address predictor. As a result, an unprivileged attacker could use this flaw to cross the syscall and guest/host boundaries and read privileged memory by conducting targeted cache side-channel attacks." ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Will not fix",
    "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-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Not affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2022-23824\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-23824\nhttps://www.amd.com/en/corporate/product-security/bulletin/amd-sb-1040\nhttps://www.amd.com/system/files/documents/software-techniques-for-managing-speculation.pdf" ],
  "name" : "CVE-2022-23824",
  "mitigation" : {
    "value" : "Please see the vulnerability response article for the full list of updates available and a detailed discussion of this issue, which compares the existing mitigation for CVE-2022-23816 and CVE-2022-29900, mentioning Mitigation V2-3 of Software Techniques for Managing Speculation.pdf, and a suggests that Hypervisor and OS vendors review their usages of IBPB.",
    "lang" : "en:us"
  },
  "csaw" : false
}