{
  "threat_severity" : "Moderate",
  "public_date" : "2024-05-21T00:00:00Z",
  "bugzilla" : {
    "description" : "kernel: drm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL",
    "id" : "2282676",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2282676"
  },
  "cvss3" : {
    "cvss3_base_score" : "5.5",
    "cvss3_scoring_vector" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
    "status" : "verified"
  },
  "cwe" : "CWE-476",
  "details" : [ "In the Linux kernel, the following vulnerability has been resolved:\ndrm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL\nIn certain types of chips, such as VEGA20, reading the amdgpu_regs_smc file could result in an abnormal null pointer access when the smc_rreg pointer is NULL. Below are the steps to reproduce this issue and the corresponding exception log:\n1. Navigate to the directory: /sys/kernel/debug/dri/0\n2. Execute command: cat amdgpu_regs_smc\n3. Exception Log::\n[4005007.702554] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[4005007.702562] #PF: supervisor instruction fetch in kernel mode\n[4005007.702567] #PF: error_code(0x0010) - not-present page\n[4005007.702570] PGD 0 P4D 0\n[4005007.702576] Oops: 0010 [#1] SMP NOPTI\n[4005007.702581] CPU: 4 PID: 62563 Comm: cat Tainted: G           OE     5.15.0-43-generic #46-Ubunt       u\n[4005007.702590] RIP: 0010:0x0\n[4005007.702598] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.\n[4005007.702600] RSP: 0018:ffffa82b46d27da0 EFLAGS: 00010206\n[4005007.702605] RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffa82b46d27e68\n[4005007.702609] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9940656e0000\n[4005007.702612] RBP: ffffa82b46d27dd8 R08: 0000000000000000 R09: ffff994060c07980\n[4005007.702615] R10: 0000000000020000 R11: 0000000000000000 R12: 00007f5e06753000\n[4005007.702618] R13: ffff9940656e0000 R14: ffffa82b46d27e68 R15: 00007f5e06753000\n[4005007.702622] FS:  00007f5e0755b740(0000) GS:ffff99479d300000(0000) knlGS:0000000000000000\n[4005007.702626] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[4005007.702629] CR2: ffffffffffffffd6 CR3: 00000003253fc000 CR4: 00000000003506e0\n[4005007.702633] Call Trace:\n[4005007.702636]  <TASK>\n[4005007.702640]  amdgpu_debugfs_regs_smc_read+0xb0/0x120 [amdgpu]\n[4005007.703002]  full_proxy_read+0x5c/0x80\n[4005007.703011]  vfs_read+0x9f/0x1a0\n[4005007.703019]  ksys_read+0x67/0xe0\n[4005007.703023]  __x64_sys_read+0x19/0x20\n[4005007.703028]  do_syscall_64+0x5c/0xc0\n[4005007.703034]  ? do_user_addr_fault+0x1e3/0x670\n[4005007.703040]  ? exit_to_user_mode_prepare+0x37/0xb0\n[4005007.703047]  ? irqentry_exit_to_user_mode+0x9/0x20\n[4005007.703052]  ? irqentry_exit+0x19/0x30\n[4005007.703057]  ? exc_page_fault+0x89/0x160\n[4005007.703062]  ? asm_exc_page_fault+0x8/0x30\n[4005007.703068]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[4005007.703075] RIP: 0033:0x7f5e07672992\n[4005007.703079] Code: c0 e9 b2 fe ff ff 50 48 8d 3d fa b2 0c 00 e8 c5 1d 02 00 0f 1f 44 00 00 f3 0f        1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 e       c 28 48 89 54 24\n[4005007.703083] RSP: 002b:00007ffe03097898 EFLAGS: 00000246 ORIG_RAX: 0000000000000000\n[4005007.703088] RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 00007f5e07672992\n[4005007.703091] RDX: 0000000000020000 RSI: 00007f5e06753000 RDI: 0000000000000003\n[4005007.703094] RBP: 00007f5e06753000 R08: 00007f5e06752010 R09: 00007f5e06752010\n[4005007.703096] R10: 0000000000000022 R11: 0000000000000246 R12: 0000000000022000\n[4005007.703099] R13: 0000000000000003 R14: 0000000000020000 R15: 0000000000020000\n[4005007.703105]  </TASK>\n[4005007.703107] Modules linked in: nf_tables libcrc32c nfnetlink algif_hash af_alg binfmt_misc nls_       iso8859_1 ipmi_ssif ast intel_rapl_msr intel_rapl_common drm_vram_helper drm_ttm_helper amd64_edac t       tm edac_mce_amd kvm_amd ccp mac_hid k10temp kvm acpi_ipmi ipmi_si rapl sch_fq_codel ipmi_devintf ipm       i_msghandler msr parport_pc ppdev lp parport mtd pstore_blk efi_pstore ramoops pstore_zone reed_solo       mon ip_tables x_tables autofs4 ib_uverbs ib_core amdgpu(OE) amddrm_ttm_helper(OE) amdttm(OE) iommu_v       2 amd_sched(OE) amdkcl(OE) drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops cec rc_core        drm igb ahci xhci_pci libahci i2c_piix4 i2c_algo_bit xhci_pci_renesas dca\n[4005007.703184] CR2: 0000000000000000\n[4005007.703188] ---[ en\n---truncated---" ],
  "affected_release" : [ {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-09-24T00:00:00Z",
    "advisory" : "RHSA-2024:7001",
    "cpe" : "cpe:/a:redhat:enterprise_linux:8::nfv",
    "package" : "kernel-rt-0:4.18.0-553.22.1.rt7.363.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 8",
    "release_date" : "2024-09-24T00:00:00Z",
    "advisory" : "RHSA-2024:7000",
    "cpe" : "cpe:/o:redhat:enterprise_linux:8",
    "package" : "kernel-0:4.18.0-553.22.1.el8_10"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-04-30T00:00:00Z",
    "advisory" : "RHSA-2024:2394",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.13.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-11-12T00:00:00Z",
    "advisory" : "RHSA-2024:9315",
    "cpe" : "cpe:/a:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.11.1.el9_5"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-04-30T00:00:00Z",
    "advisory" : "RHSA-2024:2394",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-427.13.1.el9_4"
  }, {
    "product_name" : "Red Hat Enterprise Linux 9",
    "release_date" : "2024-11-12T00:00:00Z",
    "advisory" : "RHSA-2024:9315",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9",
    "package" : "kernel-0:5.14.0-503.11.1.el9_5"
  } ],
  "package_state" : [ {
    "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-rt",
    "cpe" : "cpe:/o:redhat:enterprise_linux:9"
  } ],
  "references" : [ "https://www.cve.org/CVERecord?id=CVE-2023-52817\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52817\nhttps://lore.kernel.org/linux-cve-announce/2024052104-CVE-2023-52817-ba29@gregkh/T" ],
  "name" : "CVE-2023-52817",
  "csaw" : false
}