{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-43901",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-43901"
  ],
  "published": "2024-08-26T10:22:19Z",
  "summary": "drm/amd/display: Fix NULL pointer dereference for DTN log in DCN401",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix NULL pointer dereference for DTN log in DCN401\n\nWhen users run the command:\n\ncat /sys/kernel/debug/dri/0/amdgpu_dm_dtn_log\n\nThe following NULL pointer dereference happens:\n\n[  +0.000003] BUG: kernel NULL pointer dereference, address: NULL\n[  +0.000005] #PF: supervisor instruction fetch in kernel mode\n[  +0.000002] #PF: error_code(0x0010) - not-present page\n[  +0.000002] PGD 0 P4D 0\n[  +0.000004] Oops: 0010 [#1] PREEMPT SMP NOPTI\n[  +0.000003] RIP: 0010:0x0\n[  +0.000008] Code: Unable to access opcode bytes at 0xffffffffffffffd6.\n[...]\n[  +0.000002] PKRU: 55555554\n[  +0.000002] Call Trace:\n[  +0.000002]  <TASK>\n[  +0.000003]  ? show_regs+0x65/0x70\n[  +0.000006]  ? __die+0x24/0x70\n[  +0.000004]  ? page_fault_oops+0x160/0x470\n[  +0.000006]  ? do_user_addr_fault+0x2b5/0x690\n[  +0.000003]  ? prb_read_valid+0x1c/0x30\n[  +0.000005]  ? exc_page_fault+0x8c/0x1a0\n[  +0.000005]  ? asm_exc_page_fault+0x27/0x30\n[  +0.000012]  dcn10_log_color_state+0xf9/0x510 [amdgpu]\n[  +0.000306]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  +0.000003]  ? vsnprintf+0x2fb/0x600\n[  +0.000009]  dcn10_log_hw_state+0xfd0/0xfe0 [amdgpu]\n[  +0.000218]  ? __mod_memcg_lruvec_state+0xe8/0x170\n[  +0.000008]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  +0.000002]  ? debug_smp_processor_id+0x17/0x20\n[  +0.000003]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  +0.000002]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  +0.000002]  ? set_ptes.isra.0+0x2b/0x90\n[  +0.000004]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  +0.000002]  ? _raw_spin_unlock+0x19/0x40\n[  +0.000004]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  +0.000002]  ? do_anonymous_page+0x337/0x700\n[  +0.000004]  dtn_log_read+0x82/0x120 [amdgpu]\n[  +0.000207]  full_proxy_read+0x66/0x90\n[  +0.000007]  vfs_read+0xb0/0x340\n[  +0.000005]  ? __count_memcg_events+0x79/0xe0\n[  +0.000002]  ? srso_alias_return_thunk+0x5/0xfbef5\n[  +0.000003]  ? count_memcg_events.constprop.0+0x1e/0x40\n[  +0.000003]  ? handle_mm_fault+0xb2/0x370\n[  +0.000003]  ksys_read+0x6b/0xf0\n[  +0.000004]  __x64_sys_read+0x19/0x20\n[  +0.000003]  do_syscall_64+0x60/0x130\n[  +0.000004]  entry_SYSCALL_64_after_hwframe+0x6e/0x76\n[  +0.000003] RIP: 0033:0x7fdf32f147e2\n[...]\n\nThis error happens when the color log tries to read the gamut remap\ninformation from DCN401 which is not initialized in the dcn401_dpp_funcs\nwhich leads to a null pointer dereference. This commit addresses this\nissue by adding a proper guard to access the gamut_remap callback in\ncase the specific ASIC did not implement this function.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-43901"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1e68b7ce6bc6073579fe8713ec6b85aa9cd2e351"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5af757124792817f8eb1bd0c80ad60fab519586b"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}