{
  "threat_severity" : "Low",
  "public_date" : "2025-02-26T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: arch/arm64: Fix topology initialization for core scheduling",
    "id" : "2348218",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2348218"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\narch/arm64: Fix topology initialization for core scheduling\nArm64 systems rely on store_cpu_topology() to call update_siblings_masks()\nto transfer the toplogy to the various cpu masks. This needs to be done\nbefore the call to notify_cpu_starting() which tells the scheduler about\neach cpu found, otherwise the core scheduling data structures are setup\nin a way that does not match the actual topology.\nWith smt_mask not setup correctly we bail on `cpumask_weight(smt_mask) == 1`\nfor !leaders in:\nnotify_cpu_starting()\ncpuhp_invoke_callback_range()\nsched_cpu_starting()\nsched_core_cpu_starting()\nwhich leads to rq->core not being correctly set for !leader-rq's.\nWithout this change stress-ng (which enables core scheduling in its prctl\ntests in newer versions -- i.e. with PR_SCHED_CORE support) causes a warning\nand then a crash (trimmed for legibility):\n[ 1853.805168] ------------[ cut here ]------------\n[ 1853.809784] task_rq(b)->core != rq->core\n[ 1853.809792] WARNING: CPU: 117 PID: 0 at kernel/sched/fair.c:11102 cfs_prio_less+0x1b4/0x1c4\n...\n[ 1854.015210] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000010\n...\n[ 1854.231256] Call trace:\n[ 1854.233689]  pick_next_task+0x3dc/0x81c\n[ 1854.237512]  __schedule+0x10c/0x4cc\n[ 1854.240988]  schedule_idle+0x34/0x54" ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2022-11-15T00:00:00Z",
    "advisory" : "RHSA-2022:8267",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-162.6.1.el9_1"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2022-11-15T00:00:00Z",
    "advisory" : "RHSA-2022:8267",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-162.6.1.el9_1"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "fix_state" : "Not affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10"
  }, {
    "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-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" : "Fix deferred",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2022-49090\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49090\nhttps://lore.kernel.org/linux-cve-announce/2025022658-CVE-2022-49090-c4ae@gregkh/T" ],
  "name" : "CVE-2022-49090",
  "csaw" : false
}