{
  "threat_severity" : "Moderate",
  "public_date" : "2026-06-03T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: procfs: fix missing RCU protection when reading real_parent in do_task_stat()",
    "id" : "2484477",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2484477"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.1",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-820",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\nprocfs: fix missing RCU protection when reading real_parent in do_task_stat()\nWhen reading /proc/[pid]/stat, do_task_stat() accesses task->real_parent\nwithout proper RCU protection, which leads to:\ncpu 0                               cpu 1\n-----                               -----\ndo_task_stat\nvar = task->real_parent\nrelease_task\ncall_rcu(delayed_put_task_struct)\ntask_tgid_nr_ns(var)\nrcu_read_lock   <--- Too late to protect task->real_parent!\ntask_pid_ptr    <--- UAF!\nrcu_read_unlock\nThis patch uses task_ppid_nr_ns() instead of task_tgid_nr_ns() to add\nproper RCU protection for accessing task->real_parent.", "A flaw was found in the Linux kernel's procfs component. When reading /proc/[pid]/stat, the do_task_stat() function accesses task->real_parent without proper Read-Copy-Update (RCU) protection. This missing protection creates a race condition, which can lead to a Use-After-Free (UAF) vulnerability. A local attacker could potentially exploit this to cause a system crash or achieve other unspecified impacts." ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-07-08T00:00:00Z",
    "advisory" : "RHSA-2026:36541",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "kernel-0:6.12.0-211.31.1.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-07-07T00:00:00Z",
    "advisory" : "RHSA-2026:36348",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.140.1.rt7.481.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-07-07T00:00:00Z",
    "advisory" : "RHSA-2026:36349",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.140.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-06T00:00:00Z",
    "advisory" : "RHSA-2026:36018",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.22.1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-07-06T00:00:00Z",
    "advisory" : "RHSA-2026:36018",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.22.1.el9_8"
  } ],
  "package_state" : [ {
    "product_name" : "Red Hat Enterprise Linux 6",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:6"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "kernel",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "product_name" : "Red Hat Enterprise Linux 7",
    "fix_state" : "Affected",
    "package_name" : "kernel-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:7"
  }, {
    "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-2026-46259\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46259\nhttps://lore.kernel.org/linux-cve-announce/2026060336-CVE-2026-46259-6c94@gregkh/T" ],
  "name" : "CVE-2026-46259",
  "csaw" : false
}