{
  "threat_severity" : "Important",
  "public_date" : "2026-05-06T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: drm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()",
    "id" : "2467156",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2467156"
  },
  "cvss3" : {
    "cvss3_base_score" : "7.8",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-787",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\ndrm/amdkfd: Fix out-of-bounds write in kfd_event_page_set()\nThe kfd_event_page_set() function writes KFD_SIGNAL_EVENT_LIMIT * 8\nbytes via memset without checking the buffer size parameter. This allows\nunprivileged userspace to trigger an out-of bounds kernel memory write\nby passing a small buffer, leading to  potential privilege\nescalation.", "A flaw was found in the Linux kernel's drm/amdkfd component. An unprivileged local user can exploit an out-of-bounds write vulnerability in the kfd_event_page_set() function. This occurs because the function writes data without properly validating the buffer size, allowing a small buffer to trigger a write beyond its allocated memory. Successful exploitation of this flaw could lead to potential privilege escalation." ],
  "statement" : "This Important vulnerability in the `drm/amdkfd` kernel module allows an unprivileged local attacker to trigger an out-of-bounds write, potentially leading to privilege escalation. Systems running Red Hat Enterprise Linux with AMD graphics drivers are affected.",
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 10",
    "release_date" : "2026-08-20T00:00:00Z",
    "advisory" : "RHSA-2026:57251",
    "cpe" : "cpe:/o:redhat:enterprise_linux:10.2",
    "package" : "kernel-0:6.12.0-211.49.1.el10_2"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-08-17T00:00:00Z",
    "advisory" : "RHSA-2026:55765",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.156.1.rt7.497.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2026-08-17T00:00:00Z",
    "advisory" : "RHSA-2026:55764",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.156.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-08-20T00:00:00Z",
    "advisory" : "RHSA-2026:57252",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.41.1.el9_8"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2026-08-20T00:00:00Z",
    "advisory" : "RHSA-2026:57252",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-687.41.1.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-2026-43206\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43206\nhttps://lore.kernel.org/linux-cve-announce/2026050647-CVE-2026-43206-ca61@gregkh/T" ],
  "name" : "CVE-2026-43206",
  "mitigation" : {
    "value" : "To mitigate this issue, prevent the `amdkfd` kernel module from loading if it is not required. This can be achieved by blacklisting the module.\n1. Create a new file `/etc/modprobe.d/blacklist-amdkfd.conf` with the following content:\n`blacklist amdkfd`\n2. Regenerate the initramfs to ensure the blacklist is applied during boot:\n`sudo dracut -f -v` (for RHEL 8/9)\n`sudo mkinitrd -f -v /boot/initramfs-$(uname -r).img $(uname -r)` (for RHEL 7)\n3. Reboot the system for the changes to take effect.\nNote: Blacklisting the `amdkfd` module may impact functionality that relies on the AMD KFD driver, such as certain AMD GPU compute features. Evaluate the necessity of this module before applying the mitigation.",
    "lang" : "en:us"
  },
  "csaw" : false
}