CVE-2025-22094 (GCVE-0-2025-22094)
Vulnerability from cvelistv5
Published
2025-04-16 14:12
Modified
2025-05-26 05:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/perf: Fix ref-counting on the PMU 'vpa_pmu' Commit 176cda0619b6 ("powerpc/perf: Add perf interface to expose vpa counters") introduced 'vpa_pmu' to expose Book3s-HV nested APIv2 provided L1<->L2 context switch latency counters to L1 user-space via perf-events. However the newly introduced PMU named 'vpa_pmu' doesn't assign ownership of the PMU to the module 'vpa_pmu'. Consequently the module 'vpa_pmu' can be unloaded while one of the perf-events are still active, which can lead to kernel oops and panic of the form below on a Pseries-LPAR: BUG: Kernel NULL pointer dereference on read at 0x00000058 <snip> NIP [c000000000506cb8] event_sched_out+0x40/0x258 LR [c00000000050e8a4] __perf_remove_from_context+0x7c/0x2b0 Call Trace: [c00000025fc3fc30] [c00000025f8457a8] 0xc00000025f8457a8 (unreliable) [c00000025fc3fc80] [fffffffffffffee0] 0xfffffffffffffee0 [c00000025fc3fcd0] [c000000000501e70] event_function+0xa8/0x120 <snip> Kernel panic - not syncing: Aiee, killing interrupt handler! Fix this by adding the module ownership to 'vpa_pmu' so that the module 'vpa_pmu' is ref-counted and prevented from being unloaded when perf-events are initialized.
References
Impacted products
Vendor Product Version
Linux Linux Version: 176cda0619b6c17a553625f6e2fcbc3981ad667d
Version: 176cda0619b6c17a553625f6e2fcbc3981ad667d
Version: 176cda0619b6c17a553625f6e2fcbc3981ad667d
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/perf/vpa-pmu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "70ea7c5189197c6f5acdcfd8a2651be2c41e2faa",
              "status": "affected",
              "version": "176cda0619b6c17a553625f6e2fcbc3981ad667d",
              "versionType": "git"
            },
            {
              "lessThan": "6cf045b51e2c5721db7e55305f09ee32741e00f9",
              "status": "affected",
              "version": "176cda0619b6c17a553625f6e2fcbc3981ad667d",
              "versionType": "git"
            },
            {
              "lessThan": "ff99d5b6a246715f2257123cdf6c4a29cb33aa78",
              "status": "affected",
              "version": "176cda0619b6c17a553625f6e2fcbc3981ad667d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/perf/vpa-pmu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.13.*",
              "status": "unaffected",
              "version": "6.13.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.14.*",
              "status": "unaffected",
              "version": "6.14.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13.11",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.14.2",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/perf: Fix ref-counting on the PMU \u0027vpa_pmu\u0027\n\nCommit 176cda0619b6 (\"powerpc/perf: Add perf interface to expose vpa\ncounters\") introduced \u0027vpa_pmu\u0027 to expose Book3s-HV nested APIv2 provided\nL1\u003c-\u003eL2 context switch latency counters to L1 user-space via\nperf-events. However the newly introduced PMU named \u0027vpa_pmu\u0027 doesn\u0027t\nassign ownership of the PMU to the module \u0027vpa_pmu\u0027. Consequently the\nmodule \u0027vpa_pmu\u0027 can be unloaded while one of the perf-events are still\nactive, which can lead to kernel oops and panic of the form below on a\nPseries-LPAR:\n\nBUG: Kernel NULL pointer dereference on read at 0x00000058\n\u003csnip\u003e\n NIP [c000000000506cb8] event_sched_out+0x40/0x258\n LR [c00000000050e8a4] __perf_remove_from_context+0x7c/0x2b0\n Call Trace:\n [c00000025fc3fc30] [c00000025f8457a8] 0xc00000025f8457a8 (unreliable)\n [c00000025fc3fc80] [fffffffffffffee0] 0xfffffffffffffee0\n [c00000025fc3fcd0] [c000000000501e70] event_function+0xa8/0x120\n\u003csnip\u003e\n Kernel panic - not syncing: Aiee, killing interrupt handler!\n\nFix this by adding the module ownership to \u0027vpa_pmu\u0027 so that the module\n\u0027vpa_pmu\u0027 is ref-counted and prevented from being unloaded when perf-events\nare initialized."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:18:20.178Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/70ea7c5189197c6f5acdcfd8a2651be2c41e2faa"
        },
        {
          "url": "https://git.kernel.org/stable/c/6cf045b51e2c5721db7e55305f09ee32741e00f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/ff99d5b6a246715f2257123cdf6c4a29cb33aa78"
        }
      ],
      "title": "powerpc/perf: Fix ref-counting on the PMU \u0027vpa_pmu\u0027",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-22094",
    "datePublished": "2025-04-16T14:12:45.512Z",
    "dateReserved": "2024-12-29T08:45:45.818Z",
    "dateUpdated": "2025-05-26T05:18:20.178Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-22094\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-04-16T15:16:03.593\",\"lastModified\":\"2025-04-17T20:22:16.240\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/perf: Fix ref-counting on the PMU \u0027vpa_pmu\u0027\\n\\nCommit 176cda0619b6 (\\\"powerpc/perf: Add perf interface to expose vpa\\ncounters\\\") introduced \u0027vpa_pmu\u0027 to expose Book3s-HV nested APIv2 provided\\nL1\u003c-\u003eL2 context switch latency counters to L1 user-space via\\nperf-events. However the newly introduced PMU named \u0027vpa_pmu\u0027 doesn\u0027t\\nassign ownership of the PMU to the module \u0027vpa_pmu\u0027. Consequently the\\nmodule \u0027vpa_pmu\u0027 can be unloaded while one of the perf-events are still\\nactive, which can lead to kernel oops and panic of the form below on a\\nPseries-LPAR:\\n\\nBUG: Kernel NULL pointer dereference on read at 0x00000058\\n\u003csnip\u003e\\n NIP [c000000000506cb8] event_sched_out+0x40/0x258\\n LR [c00000000050e8a4] __perf_remove_from_context+0x7c/0x2b0\\n Call Trace:\\n [c00000025fc3fc30] [c00000025f8457a8] 0xc00000025f8457a8 (unreliable)\\n [c00000025fc3fc80] [fffffffffffffee0] 0xfffffffffffffee0\\n [c00000025fc3fcd0] [c000000000501e70] event_function+0xa8/0x120\\n\u003csnip\u003e\\n Kernel panic - not syncing: Aiee, killing interrupt handler!\\n\\nFix this by adding the module ownership to \u0027vpa_pmu\u0027 so that the module\\n\u0027vpa_pmu\u0027 is ref-counted and prevented from being unloaded when perf-events\\nare initialized.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/perf: Se corrige el conteo de referencias en la PMU \u0027vpa_pmu\u0027. El commit 176cda0619b6 (\\\"powerpc/perf: A\u00f1adir interfaz perf para exponer contadores vpa\\\") introdujo \u0027vpa_pmu\u0027 para exponer los contadores de latencia de cambio de contexto L1\u0026lt;-\u0026gt;L2 proporcionados por la APIv2 anidada de Book3s-HV al espacio de usuario L1 mediante eventos perf. Sin embargo, la nueva PMU, denominada \u0027vpa_pmu\u0027, no asigna la propiedad de la PMU al m\u00f3dulo \u0027vpa_pmu\u0027. En consecuencia, el m\u00f3dulo \u0027vpa_pmu\u0027 se puede descargar mientras uno de los eventos de rendimiento a\u00fan est\u00e1 activo, lo que puede provocar errores y p\u00e1nico en el kernel del formato siguiente en un Pseries-LPAR: ERROR: Desreferencia de puntero NULL del kernel en lectura en 0x00000058  NIP [c000000000506cb8] event_sched_out+0x40/0x258 LR [c00000000050e8a4] __perf_remove_from_context+0x7c/0x2b0 Rastreo de llamadas: [c00000025fc3fc30] [c00000025f8457a8] 0xc00000025f8457a8 (no confiable) [c00000025fc3fc80] [ffffffffffffffee0] 0xffffffffffffffee0 [c00000025fc3fcd0] [c000000000501e70] event_function+0xa8/0x120  P\u00e1nico del kernel: no se sincroniza: \u00a1Ay, se est\u00e1 eliminando el controlador de interrupciones! Para solucionarlo, agregue la propiedad del m\u00f3dulo a \u0027vpa_pmu\u0027 para que se contabilice y se evite su descarga al inicializar eventos de rendimiento.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6cf045b51e2c5721db7e55305f09ee32741e00f9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/70ea7c5189197c6f5acdcfd8a2651be2c41e2faa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ff99d5b6a246715f2257123cdf6c4a29cb33aa78\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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