{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2022-48922",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-48922",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2024-08-22T01:32:55.803Z",
    "updatedAt": "2026-05-11T18:49:44.802Z",
    "importedAt": "2026-10-24T01:56:45.230Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "riscv: fix oops caused by irqsoff latency tracer",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nriscv: fix oops caused by irqsoff latency tracer\n\nThe trace_hardirqs_{on,off}() require the caller to setup frame pointer\nproperly. This because these two functions use macro 'CALLER_ADDR1' (aka.\n__builtin_return_address(1)) to acquire caller info. If the $fp is used\nfor other purpose, the code generated this macro (as below) could trigger\nmemory access fault.\n\n   0xffffffff8011510e <+80>:    ld      a1,-16(s0)\n   0xffffffff80115112 <+84>:    ld      s2,-8(a1)  # <-- paging fault here\n\nThe oops message during booting if compiled with 'irqoff' tracer enabled:\n[    0.039615][    T0] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000f8\n[    0.041925][    T0] Oops [#1]\n[    0.042063][    T0] Modules linked in:\n[    0.042864][    T0] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.17.0-rc1-00233-g9a20c48d1ed2 #29\n[    0.043568][    T0] Hardware name: riscv-virtio,qemu (DT)\n[    0.044343][    T0] epc : trace_hardirqs_on+0x56/0xe2\n[    0.044601][    T0]  ra : restore_all+0x12/0x6e\n[    0.044721][    T0] epc : ffffffff80126a5c ra : ffffffff80003b94 sp : ffffffff81403db0\n[    0.044801][    T0]  gp : ffffffff8163acd8 tp : ffffffff81414880 t0 : 0000000000000020\n[    0.044882][    T0]  t1 : 0098968000000000 t2 : 0000000000000000 s0 : ffffffff81403de0\n[    0.044967][    T0]  s1 : 0000000000000000 a0 : 0000000000000001 a1 : 0000000000000100\n[    0.045046][    T0]  a2 : 0000000000000000 a3 : 0000000000000000 a4 : 0000000000000000\n[    0.045124][    T0]  a5 : 0000000000000000 a6 : 0000000000000000 a7 : 0000000054494d45\n[    0.045210][    T0]  s2 : ffffffff80003b94 s3 : ffffffff81a8f1b0 s4 : ffffffff80e27b50\n[    0.045289][    T0]  s5 : ffffffff81414880 s6 : ffffffff8160fa00 s7 : 00000000800120e8\n[    0.045389][    T0]  s8 : 0000000080013100 s9 : 000000000000007f s10: 0000000000000000\n[    0.045474][    T0]  s11: 0000000000000000 t3 : 7fffffffffffffff t4 : 0000000000000000\n[    0.045548][    T0]  t5 : 0000000000000000 t6 : ffffffff814aa368\n[    0.045620][    T0] status: 0000000200000100 badaddr: 00000000000000f8 cause: 000000000000000d\n[    0.046402][    T0] [<ffffffff80003b94>] restore_all+0x12/0x6e\n\nThis because the $fp(aka. $s0) register is not used as frame pointer in the\nassembly entry code.\n\n\tresume_kernel:\n\t\tREG_L s0, TASK_TI_PREEMPT_COUNT(tp)\n\t\tbnez s0, restore_all\n\t\tREG_L s0, TASK_TI_FLAGS(tp)\n                andi s0, s0, _TIF_NEED_RESCHED\n                beqz s0, restore_all\n                call preempt_schedule_irq\n                j restore_all\n\nTo fix above issue, here we add one extra level wrapper for function\ntrace_hardirqs_{on,off}() so they can be safely called by low level entry\ncode.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "3c46979829824da5af8766d89fa877976bdae884",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9e2dbc31e367d08ee299a0d8aeb498cb2e12a1c3"
            },
            {
              "version": "3c46979829824da5af8766d89fa877976bdae884",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1851b9a467065b18ec2cba156eea345206df1c8f"
            },
            {
              "version": "3c46979829824da5af8766d89fa877976bdae884",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b5e180490db4af8c0f80c4b65ee482d333d0e8ee"
            },
            {
              "version": "3c46979829824da5af8766d89fa877976bdae884",
              "status": "affected",
              "versionType": "git",
              "lessThan": "22e2100b1b07d6f5acc71cc1acb53f680c677d77"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.9",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.9"
            },
            {
              "version": "5.10.103",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.26",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "5.16.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.16.*"
            },
            {
              "version": "5.17",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}