{
  "public_date" : "2026-05-08T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: drm/amd/display: Fix NULL pointer dereference in dcn401_init_hw()",
    "id" : "2468117",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2468117"
  },
  "cwe" : "CWE-476",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\ndrm/amd/display: Fix NULL pointer dereference in dcn401_init_hw()\ndcn401_init_hw() assumes that update_bw_bounding_box() is valid when\nentering the update path. However, the existing condition:\n((!fams2_enable && update_bw_bounding_box) || freq_changed)\ndoes not guarantee this, as the freq_changed branch can evaluate to true\nindependently of the callback pointer.\nThis can result in calling update_bw_bounding_box() when it is NULL.\nFix this by separating the update condition from the pointer checks and\nensuring the callback, dc->clk_mgr, and bw_params are validated before\nuse.\nFixes the below:\n../dc/hwss/dcn401/dcn401_hwseq.c:367 dcn401_init_hw() error: we previously assumed 'dc->res_pool->funcs->update_bw_bounding_box' could be null (see line 362)\n(cherry picked from commit 86117c5ab42f21562fedb0a64bffea3ee5fcd477)", "A flaw was found in the Linux kernel's `drm/amd/display` component. This flaw occurs because the `dcn401_init_hw()` function does not properly validate a callback pointer (`update_bw_bounding_box`) before use. This can lead to a NULL pointer dereference, potentially causing a system crash or denial of service." ],
  "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" : "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-2026-43337\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43337\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43337.mbox" ],
  "name" : "CVE-2026-43337",
  "csaw" : false
}