{
  "threat_severity" : "Moderate",
  "public_date" : "2025-02-26T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: um: Fix out-of-bounds read in LDT setup",
    "id" : "2347899",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2347899"
  },
  "cvss3" : {
    "cvss3_base_score" : "6.0",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-125",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\num: Fix out-of-bounds read in LDT setup\nsyscall_stub_data() expects the data_count parameter to be the number of\nlongs, not bytes.\n==================================================================\nBUG: KASAN: stack-out-of-bounds in syscall_stub_data+0x70/0xe0\nRead of size 128 at addr 000000006411f6f0 by task swapper/1\nCPU: 0 PID: 1 Comm: swapper Not tainted 5.18.0+ #18\nCall Trace:\nshow_stack.cold+0x166/0x2a7\n__dump_stack+0x3a/0x43\ndump_stack_lvl+0x1f/0x27\nprint_report.cold+0xdb/0xf81\nkasan_report+0x119/0x1f0\nkasan_check_range+0x3a3/0x440\nmemcpy+0x52/0x140\nsyscall_stub_data+0x70/0xe0\nwrite_ldt_entry+0xac/0x190\ninit_new_ldt+0x515/0x960\ninit_new_context+0x2c4/0x4d0\nmm_init.constprop.0+0x5ed/0x760\nmm_alloc+0x118/0x170\n0x60033f48\ndo_one_initcall+0x1d7/0x860\n0x60003e7b\nkernel_init+0x6e/0x3d4\nnew_thread_handler+0x1e7/0x2c0\nThe buggy address belongs to stack of task swapper/1\nand is located at offset 64 in frame:\ninit_new_ldt+0x0/0x960\nThis frame has 2 objects:\n[32, 40) 'addr'\n[64, 80) 'desc'\n==================================================================", "A vulnerability was found in the Linux kernel's user mode (um) subsystem, specifically within the Local Descriptor Table (LDT) setup functionality. The issue arises from the syscall_stub_data() function misinterpreting the data_count parameter as a byte count rather than a count of longs, leading to an out-of-bounds read. This flaw could expose sensitive kernel memory and cause system instability." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2025-06-10T00:00:00Z",
    "advisory" : "RHSA-2025:8744",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.56.1.rt7.397.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2025-06-10T00:00:00Z",
    "advisory" : "RHSA-2025:8743",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.56.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.2 Advanced Update Support",
    "release_date" : "2025-07-02T00:00:00Z",
    "advisory" : "RHSA-2025:10179",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.2",
    "package" : "kernel-0:4.18.0-193.156.1.el8_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support",
    "release_date" : "2025-07-14T00:00:00Z",
    "advisory" : "RHSA-2025:10828",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.4",
    "package" : "kernel-0:4.18.0-305.162.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On",
    "release_date" : "2025-07-14T00:00:00Z",
    "advisory" : "RHSA-2025:10828",
    "cpe" : "cpe:/o:redhat:rhel_eus_long_life:8.4",
    "package" : "kernel-0:4.18.0-305.162.1.el8_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support",
    "release_date" : "2025-07-23T00:00:00Z",
    "advisory" : "RHSA-2025:11570",
    "cpe" : "cpe:/o:redhat:rhel_aus:8.6",
    "package" : "kernel-0:4.18.0-372.153.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Telecommunications Update Service",
    "release_date" : "2025-07-23T00:00:00Z",
    "advisory" : "RHSA-2025:11570",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.6",
    "package" : "kernel-0:4.18.0-372.153.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions",
    "release_date" : "2025-07-23T00:00:00Z",
    "advisory" : "RHSA-2025:11570",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.6",
    "package" : "kernel-0:4.18.0-372.153.1.el8_6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Telecommunications Update Service",
    "release_date" : "2025-07-02T00:00:00Z",
    "advisory" : "RHSA-2025:10211",
    "cpe" : "cpe:/o:redhat:rhel_tus:8.8",
    "package" : "kernel-0:4.18.0-477.100.1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions",
    "release_date" : "2025-07-02T00:00:00Z",
    "advisory" : "RHSA-2025:10211",
    "cpe" : "cpe:/o:redhat:rhel_e4s:8.8",
    "package" : "kernel-0:4.18.0-477.100.1.el8_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
    "release_date" : "2025-07-14T00:00:00Z",
    "advisory" : "RHSA-2025:10830",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.0",
    "package" : "kernel-0:5.14.0-70.138.1.el9_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions",
    "release_date" : "2025-07-14T00:00:00Z",
    "advisory" : "RHSA-2025:10829",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.0::nfv",
    "package" : "kernel-rt-0:5.14.0-70.138.1.rt21.210.el9_0"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "release_date" : "2025-07-15T00:00:00Z",
    "advisory" : "RHSA-2025:11045",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.2",
    "package" : "kernel-0:5.14.0-284.125.1.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
    "release_date" : "2025-07-07T00:00:00Z",
    "advisory" : "RHSA-2025:10527",
    "cpe" : "cpe:/a:redhat:rhel_e4s:9.2::nfv",
    "package" : "kernel-rt-0:5.14.0-284.125.1.rt14.410.el9_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9.4 Extended Update Support",
    "release_date" : "2025-08-06T00:00:00Z",
    "advisory" : "RHSA-2025:13135",
    "cpe" : "cpe:/a:redhat:rhel_eus:9.4",
    "package" : "kernel-0:5.14.0-427.81.1.el9_4"
  } ],
  "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" : "Out of support scope",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Out of support scope",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2022-49395\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49395\nhttps://lore.kernel.org/linux-cve-announce/2025022650-CVE-2022-49395-7419@gregkh/T" ],
  "name" : "CVE-2022-49395",
  "csaw" : false
}