{
  "threat_severity" : "Moderate",
  "public_date" : "2024-11-05T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: LoongArch: Don't crash in stack_top() for tasks without vDSO",
    "id" : "2323935",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2323935"
  },
  "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" : "draft"
  },
  "cwe" : "CWE-476",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nLoongArch: Don't crash in stack_top() for tasks without vDSO\nNot all tasks have a vDSO mapped, for example kthreads never do. If such\na task ever ends up calling stack_top(), it will derefence the NULL vdso\npointer and crash.\nThis can for example happen when using kunit:\n[<9000000000203874>] stack_top+0x58/0xa8\n[<90000000002956cc>] arch_pick_mmap_layout+0x164/0x220\n[<90000000003c284c>] kunit_vm_mmap_init+0x108/0x12c\n[<90000000003c1fbc>] __kunit_add_resource+0x38/0x8c\n[<90000000003c2704>] kunit_vm_mmap+0x88/0xc8\n[<9000000000410b14>] usercopy_test_init+0xbc/0x25c\n[<90000000003c1db4>] kunit_try_run_case+0x5c/0x184\n[<90000000003c3d54>] kunit_generic_run_threadfn_adapter+0x24/0x48\n[<900000000022e4bc>] kthread+0xc8/0xd4\n[<9000000000200ce8>] ret_from_kernel_thread+0xc/0xa4" ],
  "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-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-2024-50133\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50133\nhttps://lore.kernel.org/linux-cve-announce/2024110558-CVE-2024-50133-3d60@gregkh/T" ],
  "name" : "CVE-2024-50133",
  "csaw" : false
}