FKIE_CVE-2022-49894

Vulnerability from fkie_nvd - Published: 2025-05-01 15:16 - Updated: 2025-10-01 16:15
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Fix region HPA ordering validation Some regions may not have any address space allocated. Skip them when validating HPA order otherwise a crash like the following may result: devm_cxl_add_region: cxl_acpi cxl_acpi.0: decoder3.4: created region9 BUG: kernel NULL pointer dereference, address: 0000000000000000 [..] RIP: 0010:store_targetN+0x655/0x1740 [cxl_core] [..] Call Trace: <TASK> kernfs_fop_write_iter+0x144/0x200 vfs_write+0x24a/0x4d0 ksys_write+0x69/0xf0 do_syscall_64+0x3a/0x90 store_targetN+0x655/0x1740: alloc_region_ref at drivers/cxl/core/region.c:676 (inlined by) cxl_port_attach_region at drivers/cxl/core/region.c:850 (inlined by) cxl_region_attach at drivers/cxl/core/region.c:1290 (inlined by) attach_target at drivers/cxl/core/region.c:1410 (inlined by) store_targetN at drivers/cxl/core/region.c:1453
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/12316b9f7c18138ae656050cfd716728e27b7e2fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a90accb358ae33ea982a35595573f7a045993f8bPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
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    {
      "nodes": [
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              "versionEndExcluding": "6.0.8",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/region: Fix region HPA ordering validation\n\nSome regions may not have any address space allocated. Skip them when\nvalidating HPA order otherwise a crash like the following may result:\n\n devm_cxl_add_region: cxl_acpi cxl_acpi.0: decoder3.4: created region9\n BUG: kernel NULL pointer dereference, address: 0000000000000000\n [..]\n RIP: 0010:store_targetN+0x655/0x1740 [cxl_core]\n [..]\n Call Trace:\n  \u003cTASK\u003e\n  kernfs_fop_write_iter+0x144/0x200\n  vfs_write+0x24a/0x4d0\n  ksys_write+0x69/0xf0\n  do_syscall_64+0x3a/0x90\n\nstore_targetN+0x655/0x1740:\nalloc_region_ref at drivers/cxl/core/region.c:676\n(inlined by) cxl_port_attach_region at drivers/cxl/core/region.c:850\n(inlined by) cxl_region_attach at drivers/cxl/core/region.c:1290\n(inlined by) attach_target at drivers/cxl/core/region.c:1410\n(inlined by) store_targetN at drivers/cxl/core/region.c:1453"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cxl/region: Corregir la validaci\u00f3n del ordenamiento HPA de la regi\u00f3n. Algunas regiones pueden no tener ning\u00fan espacio de direcciones asignado. Om\u00edtalos al validar el orden de HPA; de lo contrario, puede producirse un fallo como el siguiente: devm_cxl_add_region: cxl_acpi cxl_acpi.0: decoder3.4: created region9 BUG: desreferencia de puntero NULL del kernel, direcci\u00f3n: 0000000000000000 [..] RIP: 0010:store_targetN+0x655/0x1740 [cxl_core] [..] Seguimiento de llamadas:  kernfs_fop_write_iter+0x144/0x200 vfs_write+0x24a/0x4d0 ksys_write+0x69/0xf0 do_syscall_64+0x3a/0x90 store_targetN+0x655/0x1740: alloc_region_ref at drivers/cxl/core/region.c:676 (integrado por) cxl_port_attach_region en drivers/cxl/core/region.c:850 (integrado por) cxl_region_attach en drivers/cxl/core/region.c:1290 (integrado por) attached_target en drivers/cxl/core/region.c:1410 (integrado por) store_targetN en drivers/cxl/core/region.c:1453"
    }
  ],
  "id": "CVE-2022-49894",
  "lastModified": "2025-10-01T16:15:49.797",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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          "baseScore": 5.5,
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  "published": "2025-05-01T15:16:14.417",
  "references": [
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      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-476"
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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}


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