GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2024-42126 (GCVE-0-2024-42126)

Vulnerability from cvelistv5 – Published: 2024-07-30 07:46 – Updated: 2026-05-11 20:27
VLAI
Title
powerpc: Avoid nmi_enter/nmi_exit in real mode interrupt.
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc: Avoid nmi_enter/nmi_exit in real mode interrupt. nmi_enter()/nmi_exit() touches per cpu variables which can lead to kernel crash when invoked during real mode interrupt handling (e.g. early HMI/MCE interrupt handler) if percpu allocation comes from vmalloc area. Early HMI/MCE handlers are called through DEFINE_INTERRUPT_HANDLER_NMI() wrapper which invokes nmi_enter/nmi_exit calls. We don't see any issue when percpu allocation is from the embedded first chunk. However with CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK enabled there are chances where percpu allocation can come from the vmalloc area. With kernel command line "percpu_alloc=page" we can force percpu allocation to come from vmalloc area and can see kernel crash in machine_check_early: [ 1.215714] NIP [c000000000e49eb4] rcu_nmi_enter+0x24/0x110 [ 1.215717] LR [c0000000000461a0] machine_check_early+0xf0/0x2c0 [ 1.215719] --- interrupt: 200 [ 1.215720] [c000000fffd73180] [0000000000000000] 0x0 (unreliable) [ 1.215722] [c000000fffd731b0] [0000000000000000] 0x0 [ 1.215724] [c000000fffd73210] [c000000000008364] machine_check_early_common+0x134/0x1f8 Fix this by avoiding use of nmi_enter()/nmi_exit() in real mode if percpu first chunk is not embedded.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:16 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: eb553f16973ade990d05946af9ae191394712c8a , < fb6675db04c4b79883373edc578d5df7bbc84848 (git)
Affected: eb553f16973ade990d05946af9ae191394712c8a , < e2afb26615adf6c3ceaaa7732aa839bcd587a057 (git)
Affected: eb553f16973ade990d05946af9ae191394712c8a , < 8d3f83dfb23674540c827a8d65fba20aa300b252 (git)
Affected: eb553f16973ade990d05946af9ae191394712c8a , < 0f37946c62c48a907625348cbc720a7a0c547d1e (git)
Affected: eb553f16973ade990d05946af9ae191394712c8a , < 2c78c9411e685dbc9eac8c2845111b03501975b8 (git)
Affected: eb553f16973ade990d05946af9ae191394712c8a , < 0db880fc865ffb522141ced4bfa66c12ab1fbb70 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.10
Unaffected: 0 , < 5.10 (semver)
Unaffected: 5.10.224 , ≤ 5.10.* (semver)
Unaffected: 5.15.165 , ≤ 5.15.* (semver)
Unaffected: 6.1.98 , ≤ 6.1.* (semver)
Unaffected: 6.6.39 , ≤ 6.6.* (semver)
Unaffected: 6.9.9 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T22:01:57.533Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/8d3f83dfb23674540c827a8d65fba20aa300b252"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0f37946c62c48a907625348cbc720a7a0c547d1e"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/2c78c9411e685dbc9eac8c2845111b03501975b8"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/0db880fc865ffb522141ced4bfa66c12ab1fbb70"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-42126",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:16:41.546139Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:04.533Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/include/asm/interrupt.h",
            "arch/powerpc/include/asm/percpu.h",
            "arch/powerpc/kernel/setup_64.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fb6675db04c4b79883373edc578d5df7bbc84848",
              "status": "affected",
              "version": "eb553f16973ade990d05946af9ae191394712c8a",
              "versionType": "git"
            },
            {
              "lessThan": "e2afb26615adf6c3ceaaa7732aa839bcd587a057",
              "status": "affected",
              "version": "eb553f16973ade990d05946af9ae191394712c8a",
              "versionType": "git"
            },
            {
              "lessThan": "8d3f83dfb23674540c827a8d65fba20aa300b252",
              "status": "affected",
              "version": "eb553f16973ade990d05946af9ae191394712c8a",
              "versionType": "git"
            },
            {
              "lessThan": "0f37946c62c48a907625348cbc720a7a0c547d1e",
              "status": "affected",
              "version": "eb553f16973ade990d05946af9ae191394712c8a",
              "versionType": "git"
            },
            {
              "lessThan": "2c78c9411e685dbc9eac8c2845111b03501975b8",
              "status": "affected",
              "version": "eb553f16973ade990d05946af9ae191394712c8a",
              "versionType": "git"
            },
            {
              "lessThan": "0db880fc865ffb522141ced4bfa66c12ab1fbb70",
              "status": "affected",
              "version": "eb553f16973ade990d05946af9ae191394712c8a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/include/asm/interrupt.h",
            "arch/powerpc/include/asm/percpu.h",
            "arch/powerpc/kernel/setup_64.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.10"
            },
            {
              "lessThan": "5.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.224",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.98",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.9.*",
              "status": "unaffected",
              "version": "6.9.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.10",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.224",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.165",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.98",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.39",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9.9",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10",
                  "versionStartIncluding": "5.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc: Avoid nmi_enter/nmi_exit in real mode interrupt.\n\nnmi_enter()/nmi_exit() touches per cpu variables which can lead to kernel\ncrash when invoked during real mode interrupt handling (e.g. early HMI/MCE\ninterrupt handler) if percpu allocation comes from vmalloc area.\n\nEarly HMI/MCE handlers are called through DEFINE_INTERRUPT_HANDLER_NMI()\nwrapper which invokes nmi_enter/nmi_exit calls. We don\u0027t see any issue when\npercpu allocation is from the embedded first chunk. However with\nCONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK enabled there are chances where percpu\nallocation can come from the vmalloc area.\n\nWith kernel command line \"percpu_alloc=page\" we can force percpu allocation\nto come from vmalloc area and can see kernel crash in machine_check_early:\n\n[    1.215714] NIP [c000000000e49eb4] rcu_nmi_enter+0x24/0x110\n[    1.215717] LR [c0000000000461a0] machine_check_early+0xf0/0x2c0\n[    1.215719] --- interrupt: 200\n[    1.215720] [c000000fffd73180] [0000000000000000] 0x0 (unreliable)\n[    1.215722] [c000000fffd731b0] [0000000000000000] 0x0\n[    1.215724] [c000000fffd73210] [c000000000008364] machine_check_early_common+0x134/0x1f8\n\nFix this by avoiding use of nmi_enter()/nmi_exit() in real mode if percpu\nfirst chunk is not embedded."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:27:29.815Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fb6675db04c4b79883373edc578d5df7bbc84848"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2afb26615adf6c3ceaaa7732aa839bcd587a057"
        },
        {
          "url": "https://git.kernel.org/stable/c/8d3f83dfb23674540c827a8d65fba20aa300b252"
        },
        {
          "url": "https://git.kernel.org/stable/c/0f37946c62c48a907625348cbc720a7a0c547d1e"
        },
        {
          "url": "https://git.kernel.org/stable/c/2c78c9411e685dbc9eac8c2845111b03501975b8"
        },
        {
          "url": "https://git.kernel.org/stable/c/0db880fc865ffb522141ced4bfa66c12ab1fbb70"
        }
      ],
      "title": "powerpc: Avoid nmi_enter/nmi_exit in real mode interrupt.",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-42126",
    "datePublished": "2024-07-30T07:46:23.179Z",
    "dateReserved": "2024-07-29T15:50:41.179Z",
    "dateUpdated": "2026-05-11T20:27:29.815Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-42126",
      "date": "2026-09-16",
      "epss": "0.00228",
      "percentile": "0.13778"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-42126\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-07-30T08:15:04.743\",\"lastModified\":\"2026-06-17T07:48:53.340\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc: Avoid nmi_enter/nmi_exit in real mode interrupt.\\n\\nnmi_enter()/nmi_exit() touches per cpu variables which can lead to kernel\\ncrash when invoked during real mode interrupt handling (e.g. early HMI/MCE\\ninterrupt handler) if percpu allocation comes from vmalloc area.\\n\\nEarly HMI/MCE handlers are called through DEFINE_INTERRUPT_HANDLER_NMI()\\nwrapper which invokes nmi_enter/nmi_exit calls. We don\u0027t see any issue when\\npercpu allocation is from the embedded first chunk. However with\\nCONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK enabled there are chances where percpu\\nallocation can come from the vmalloc area.\\n\\nWith kernel command line \\\"percpu_alloc=page\\\" we can force percpu allocation\\nto come from vmalloc area and can see kernel crash in machine_check_early:\\n\\n[    1.215714] NIP [c000000000e49eb4] rcu_nmi_enter+0x24/0x110\\n[    1.215717] LR [c0000000000461a0] machine_check_early+0xf0/0x2c0\\n[    1.215719] --- interrupt: 200\\n[    1.215720] [c000000fffd73180] [0000000000000000] 0x0 (unreliable)\\n[    1.215722] [c000000fffd731b0] [0000000000000000] 0x0\\n[    1.215724] [c000000fffd73210] [c000000000008364] machine_check_early_common+0x134/0x1f8\\n\\nFix this by avoiding use of nmi_enter()/nmi_exit() in real mode if percpu\\nfirst chunk is not embedded.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc: Evite nmi_enter/nmi_exit en interrupci\u00f3n en modo real. nmi_enter()/nmi_exit() toca variables por CPU que pueden provocar un fallo del kernel cuando se invoca durante el manejo de interrupciones en modo real (por ejemplo, el controlador de interrupciones HMI/MCE temprano) si la asignaci\u00f3n de percpu proviene del \u00e1rea vmalloc. Los primeros controladores HMI/MCE se llaman a trav\u00e9s del contenedor DEFINE_INTERRUPT_HANDLER_NMI() que invoca llamadas nmi_enter/nmi_exit. No vemos ning\u00fan problema cuando la asignaci\u00f3n de percpu proviene del primer fragmento integrado. Sin embargo, con CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK habilitado, hay posibilidades de que la asignaci\u00f3n de percpu pueda provenir del \u00e1rea vmalloc. Con la l\u00ednea de comando del kernel \\\"percpu_alloc=page\\\" podemos forzar que la asignaci\u00f3n de percpu provenga del \u00e1rea vmalloc y podemos ver el fallo del kernel en machine_check_early: [1.215714] NIP [c000000000e49eb4] rcu_nmi_enter+0x24/0x110 [1.215717] LR [c0000000000461a0] check_early+0xf0/ 0x2c0 [1.215719] --- interrupci\u00f3n: 200 [ 1.215720] [c000000fffd73180] [0000000000000000] 0x0 (no confiable) [ 1.215722] [c000000fffd731b0] 000] 0x0 [ 1.215724] [c000000fffd73210] [c000000000008364] machine_check_early_common+0x134/0x1f8 Solucionar esto mediante evitando el uso de nmi_enter()/nmi_exit() en modo real si el primer fragmento de percpu no est\u00e1 incrustado.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/powerpc/include/asm/interrupt.h\",\"arch/powerpc/include/asm/percpu.h\",\"arch/powerpc/kernel/setup_64.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"eb553f16973ade990d05946af9ae191394712c8a\",\"lessThan\":\"fb6675db04c4b79883373edc578d5df7bbc84848\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"eb553f16973ade990d05946af9ae191394712c8a\",\"lessThan\":\"e2afb26615adf6c3ceaaa7732aa839bcd587a057\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"eb553f16973ade990d05946af9ae191394712c8a\",\"lessThan\":\"8d3f83dfb23674540c827a8d65fba20aa300b252\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"eb553f16973ade990d05946af9ae191394712c8a\",\"lessThan\":\"0f37946c62c48a907625348cbc720a7a0c547d1e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"eb553f16973ade990d05946af9ae191394712c8a\",\"lessThan\":\"2c78c9411e685dbc9eac8c2845111b03501975b8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"eb553f16973ade990d05946af9ae191394712c8a\",\"lessThan\":\"0db880fc865ffb522141ced4bfa66c12ab1fbb70\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/powerpc/include/asm/interrupt.h\",\"arch/powerpc/include/asm/percpu.h\",\"arch/powerpc/kernel/setup_64.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.10\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.10\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.224\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.165\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.98\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.39\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.9.9\",\"lessThanOrEqual\":\"6.9.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.10\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T16:16:41.546139Z\",\"id\":\"CVE-2024-42126\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.10\",\"versionEndExcluding\":\"5.10.224\",\"matchCriteriaId\":\"3723F85C-99C4-4BA1-A411-426E0591769E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.165\",\"matchCriteriaId\":\"B4E2B568-3171-41DE-B519-F2B1A3600D94\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.98\",\"matchCriteriaId\":\"E09E92A5-27EF-40E4-926A-B1CDC8270551\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.39\",\"matchCriteriaId\":\"29E894E4-668F-4DB0-81F7-4FB5F698E970\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.9.9\",\"matchCriteriaId\":\"ADCC1407-0CB3-4C8F-B4C5-07F682CD7085\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0db880fc865ffb522141ced4bfa66c12ab1fbb70\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0f37946c62c48a907625348cbc720a7a0c547d1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2c78c9411e685dbc9eac8c2845111b03501975b8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8d3f83dfb23674540c827a8d65fba20aa300b252\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/e2afb26615adf6c3ceaaa7732aa839bcd587a057\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/fb6675db04c4b79883373edc578d5df7bbc84848\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0db880fc865ffb522141ced4bfa66c12ab1fbb70\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/0f37946c62c48a907625348cbc720a7a0c547d1e\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/2c78c9411e685dbc9eac8c2845111b03501975b8\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8d3f83dfb23674540c827a8d65fba20aa300b252\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2025-11-21T10:44:36+00:00",
      "cve": "CVE-2024-42126",
      "id": "CVE-2024-42126",
      "initial_release_date": "2024-07-30T00:00:00+00:00",
      "product_status:known_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: powerpc: Avoid nmi_enter/nmi_exit in real mode interrupt.",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-42126.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/8d3f83dfb23674540c827a8d65fba20aa300b252\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/0f37946c62c48a907625348cbc720a7a0c547d1e\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/2c78c9411e685dbc9eac8c2845111b03501975b8\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/0db880fc865ffb522141ced4bfa66c12ab1fbb70\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T22:01:57.533Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-42126\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:16:41.546139Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:14.392Z\"}}], \"cna\": {\"title\": \"powerpc: Avoid nmi_enter/nmi_exit in real mode interrupt.\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"eb553f16973ade990d05946af9ae191394712c8a\", \"lessThan\": \"fb6675db04c4b79883373edc578d5df7bbc84848\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"eb553f16973ade990d05946af9ae191394712c8a\", \"lessThan\": \"e2afb26615adf6c3ceaaa7732aa839bcd587a057\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"eb553f16973ade990d05946af9ae191394712c8a\", \"lessThan\": \"8d3f83dfb23674540c827a8d65fba20aa300b252\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"eb553f16973ade990d05946af9ae191394712c8a\", \"lessThan\": \"0f37946c62c48a907625348cbc720a7a0c547d1e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"eb553f16973ade990d05946af9ae191394712c8a\", \"lessThan\": \"2c78c9411e685dbc9eac8c2845111b03501975b8\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"eb553f16973ade990d05946af9ae191394712c8a\", \"lessThan\": \"0db880fc865ffb522141ced4bfa66c12ab1fbb70\", \"versionType\": \"git\"}], \"programFiles\": [\"arch/powerpc/include/asm/interrupt.h\", \"arch/powerpc/include/asm/percpu.h\", \"arch/powerpc/kernel/setup_64.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.10\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.10\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.224\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.165\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.98\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.39\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"arch/powerpc/include/asm/interrupt.h\", \"arch/powerpc/include/asm/percpu.h\", \"arch/powerpc/kernel/setup_64.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/fb6675db04c4b79883373edc578d5df7bbc84848\"}, {\"url\": \"https://git.kernel.org/stable/c/e2afb26615adf6c3ceaaa7732aa839bcd587a057\"}, {\"url\": \"https://git.kernel.org/stable/c/8d3f83dfb23674540c827a8d65fba20aa300b252\"}, {\"url\": \"https://git.kernel.org/stable/c/0f37946c62c48a907625348cbc720a7a0c547d1e\"}, {\"url\": \"https://git.kernel.org/stable/c/2c78c9411e685dbc9eac8c2845111b03501975b8\"}, {\"url\": \"https://git.kernel.org/stable/c/0db880fc865ffb522141ced4bfa66c12ab1fbb70\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc: Avoid nmi_enter/nmi_exit in real mode interrupt.\\n\\nnmi_enter()/nmi_exit() touches per cpu variables which can lead to kernel\\ncrash when invoked during real mode interrupt handling (e.g. early HMI/MCE\\ninterrupt handler) if percpu allocation comes from vmalloc area.\\n\\nEarly HMI/MCE handlers are called through DEFINE_INTERRUPT_HANDLER_NMI()\\nwrapper which invokes nmi_enter/nmi_exit calls. We don\u0027t see any issue when\\npercpu allocation is from the embedded first chunk. However with\\nCONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK enabled there are chances where percpu\\nallocation can come from the vmalloc area.\\n\\nWith kernel command line \\\"percpu_alloc=page\\\" we can force percpu allocation\\nto come from vmalloc area and can see kernel crash in machine_check_early:\\n\\n[    1.215714] NIP [c000000000e49eb4] rcu_nmi_enter+0x24/0x110\\n[    1.215717] LR [c0000000000461a0] machine_check_early+0xf0/0x2c0\\n[    1.215719] --- interrupt: 200\\n[    1.215720] [c000000fffd73180] [0000000000000000] 0x0 (unreliable)\\n[    1.215722] [c000000fffd731b0] [0000000000000000] 0x0\\n[    1.215724] [c000000fffd73210] [c000000000008364] machine_check_early_common+0x134/0x1f8\\n\\nFix this by avoiding use of nmi_enter()/nmi_exit() in real mode if percpu\\nfirst chunk is not embedded.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.224\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.165\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.98\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.39\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.9\", \"versionStartIncluding\": \"5.10\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"5.10\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-21T09:12:58.986Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-42126\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T22:01:57.533Z\", \"dateReserved\": \"2024-07-29T15:50:41.179Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-30T07:46:23.179Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.