{
  "cveId": "CVE-2024-26768",
  "url": "https://patchblox.com/security/cve/CVE-2024-26768",
  "summary": "CVE-2024-26768 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-26768, released April 3, 2024. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  LoongArch: Change acpi_core_pic[NR_CPUS] to acpi...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  LoongArch: Change acpi_core_pic[NR_CPUS] to acpi_core_pic[MAX_CORE_PIC]  With default config, the value of NR_CPUS is 64. When HW platform has more then 64 cpus, system will crash on these platforms. MAX_CORE_PIC is the maximum cpu number in MADT table (max physical number) which can exceed the supported maximum cpu number (NR_CPUS, max logical number), but kernel should not crash. Kernel should boot cpus with NR_CPUS, let the remainder cpus stay in BIOS.  The potential crash reason is that the array acpi_core_pic[NR_CPUS] can be overflowed when parsing MADT table, and it is obvious that CORE_PIC should be corresponding to physical core rather than logical core, so it is better to define the array as acpi_core_pic[MAX_CORE_PIC].  With the patch, system can boot up 64 vcpus with qemu parameter -smp 128, otherwise system will crash with the following message.  [    0.000000] CPU 0 Unable to handle kernel paging request at virtual address 0000420000004259, era == 90000000037a5f0c, ra == 90000000037a46ec [    0.000000] Oops[#1]: [    0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 6.8.0-rc2\u002B #192 [    0.000000] Hardware name: QEMU QEMU Virtual Machine, BIOS unknown 2/2/2022 [    0.000000] pc 90000000037a5f0c ra 90000000037a46ec tp 9000000003c90000 sp 9000000003c93d60 [    0.000000] a0 0000000000000019 a1 9000000003d93bc0 a2 0000000000000000 a3 9000000003c93bd8 [    0.000000] a4 9000000003c93a74 a5 9000000083c93a67 a6 9000000003c938f0 a7 0000000000000005 [    0.000000] t0 0000420000004201 t1 0000000000000000 t2 0000000000000001 t3 0000000000000001 [    0.000000] t4 0000000000000003 t5 0000000000000000 t6 0000000000000030 t7 0000000000000063 [    0.000000] t8 0000000000000014 u0 ffffffffffffffff s9 0000000000000000 s0 9000000003caee98 [    0.000000] s1 90000000041b0480 s2 9000000003c93da0 s3 9000000003c93d98 s4 9000000003c93d90 [    0.000000] s5 9000000003caa000 s6 000000000a7fd000 s7 000000000f556b60 s8 000000000e0a4330 [    0.000000]    ra: 90000000037a46ec platform_init\u002B0x214/0x250 [    0.000000]   ERA: 90000000037a5f0c efi_runtime_init\u002B0x30/0x94 [    0.000000]  CRMD: 000000b0 (PLV0 -IE -DA \u002BPG DACF=CC DACM=CC -WE) [    0.000000]  PRMD: 00000000 (PPLV0 -PIE -PWE) [    0.000000]  EUEN: 00000000 (-FPE -SXE -ASXE -BTE) [    0.000000]  ECFG: 00070800 (LIE=11 VS=7) [    0.000000] ESTAT: 00010000 [PIL] (IS= ECode=1 EsubCode=0) [    0.000000]  BADV: 0000420000004259 [    0.000000]  PRID: 0014c010 (Loongson-64bit, Loongson-3A5000) [    0.000000] Modules linked in: [    0.000000] Process swapper (pid: 0, threadinfo=(____ptrval____), task=(____ptrval____)) [    0.000000] Stack : 9000000003c93a14 9000000003800898 90000000041844f8 90000000037a46ec [    0.000000]         000000000a7fd000 0000000008290000 0000000000000000 0000000000000000 [    0.000000]         0000000000000000 0000000000000000 00000000019d8000 000000000f556b60 [    0.000000]         000000000a7fd000 000000000f556b08 9000000003ca7700 9000000003800000 [    0.000000]         9000000003c93e50 9000000003800898 9000000003800108 90000000037a484c [    0.000000]         000000000e0a4330 000000000f556b60 000000000a7fd000 000000000f556b08 [    0.000000]         9000000003ca7700 9000000004184000 0000000000200000 000000000e02b018 [    0.000000]         000000000a7fd000 90000000037a0790 9000000003800108 0000000000000000 [    0.000000]         0000000000000000 000000000e0a4330 000000000f556b60 000000000a7fd000 [    0.000000]         000000000f556b08 000000000eaae298 000000000eaa5040 0000000000200000 [    0.000000]         ... [    0.000000] Call Trace: [    0.000000] [\u003C90000000037a5f0c\u003E] efi_runtime_init\u002B0x30/0x94 [    0.000000] [\u003C90000000037a46ec\u003E] platform_init\u002B0x214/0x250 [    0.000000] [\u003C90000000037a484c\u003E] setup_arch\u002B0x124/0x45c [    0.000000] [\u003C90000000037a0790\u003E] start_kernel\u002B0x90/0x670 [    0.000000] [\u003C900000000378b0d8\u003E] kernel_entry\u002B0xd8/0xdc",
  "published": "2024-04-03T17:15:52Z",
  "severity": "high",
  "cvss": 7.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00603,
  "epssPercentile": 0.49125,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.7.7-1",
      "fix": "DEBIAN-CVE-2024-26768",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-26768",
      "released": "2024-04-03T17:15:52Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.7.7-1",
      "fix": "DEBIAN-CVE-2024-26768",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2024-26768",
      "released": "2024-04-03T17:15:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T19:12:23Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}