{
  "cveId": "CVE-2022-48922",
  "url": "https://patchblox.com/security/cve/CVE-2022-48922",
  "summary": "CVE-2022-48922 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48922, released August 22, 2024. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  riscv: fix oops caused by irqsoff latency tracer...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  riscv: fix oops caused by irqsoff latency tracer  The trace_hardirqs_{on,off}() require the caller to setup frame pointer properly. This because these two functions use macro \u0027CALLER_ADDR1\u0027 (aka. __builtin_return_address(1)) to acquire caller info. If the $fp is used for other purpose, the code generated this macro (as below) could trigger memory access fault.     0xffffffff8011510e \u003C\u002B80\u003E:    ld      a1,-16(s0)    0xffffffff80115112 \u003C\u002B84\u003E:    ld      s2,-8(a1)  # \u003C-- paging fault here  The oops message during booting if compiled with \u0027irqoff\u0027 tracer enabled: [    0.039615][    T0] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000f8 [    0.041925][    T0] Oops [#1] [    0.042063][    T0] Modules linked in: [    0.042864][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.17.0-rc1-00233-g9a20c48d1ed2 #29 [    0.043568][    T0] Hardware name: riscv-virtio,qemu (DT) [    0.044343][    T0] epc : trace_hardirqs_on\u002B0x56/0xe2 [    0.044601][    T0]  ra : restore_all\u002B0x12/0x6e [    0.044721][    T0] epc : ffffffff80126a5c ra : ffffffff80003b94 sp : ffffffff81403db0 [    0.044801][    T0]  gp : ffffffff8163acd8 tp : ffffffff81414880 t0 : 0000000000000020 [    0.044882][    T0]  t1 : 0098968000000000 t2 : 0000000000000000 s0 : ffffffff81403de0 [    0.044967][    T0]  s1 : 0000000000000000 a0 : 0000000000000001 a1 : 0000000000000100 [    0.045046][    T0]  a2 : 0000000000000000 a3 : 0000000000000000 a4 : 0000000000000000 [    0.045124][    T0]  a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000054494d45 [    0.045210][    T0]  s2 : ffffffff80003b94 s3 : ffffffff81a8f1b0 s4 : ffffffff80e27b50 [    0.045289][    T0]  s5 : ffffffff81414880 s6 : ffffffff8160fa00 s7 : 00000000800120e8 [    0.045389][    T0]  s8 : 0000000080013100 s9 : 000000000000007f s10: 0000000000000000 [    0.045474][    T0]  s11: 0000000000000000 t3 : 7fffffffffffffff t4 : 0000000000000000 [    0.045548][    T0]  t5 : 0000000000000000 t6 : ffffffff814aa368 [    0.045620][    T0] status: 0000000200000100 badaddr: 00000000000000f8 cause: 000000000000000d [    0.046402][    T0] [\u003Cffffffff80003b94\u003E] restore_all\u002B0x12/0x6e  This because the $fp(aka. $s0) register is not used as frame pointer in the assembly entry code.  \tresume_kernel: \t\tREG_L s0, TASK_TI_PREEMPT_COUNT(tp) \t\tbnez s0, restore_all \t\tREG_L s0, TASK_TI_FLAGS(tp)                 andi s0, s0, _TIF_NEED_RESCHED                 beqz s0, restore_all                 call preempt_schedule_irq                 j restore_all  To fix above issue, here we add one extra level wrapper for function trace_hardirqs_{on,off}() so they can be safely called by low level entry code.",
  "published": "2024-08-22T02:15:08Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00207,
  "epssPercentile": 0.10836,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "5.16.12-1",
      "fix": "DEBIAN-CVE-2022-48922",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48922",
      "released": "2024-08-22T02:15:08Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "5.16.12-1",
      "fix": "DEBIAN-CVE-2022-48922",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48922",
      "released": "2024-08-22T02:15:08Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "5.16.12-1",
      "fix": "DEBIAN-CVE-2022-48922",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2022-48922",
      "released": "2024-08-22T02:15:08Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}