gsd-2024-26710
Vulnerability from gsd
Modified
2024-02-20 06:02
Details
In the Linux kernel, the following vulnerability has been resolved: powerpc/kasan: Limit KASAN thread size increase to 32KB KASAN is seen to increase stack usage, to the point that it was reported to lead to stack overflow on some 32-bit machines (see link). To avoid overflows the stack size was doubled for KASAN builds in commit 3e8635fb2e07 ("powerpc/kasan: Force thread size increase with KASAN"). However with a 32KB stack size to begin with, the doubling leads to a 64KB stack, which causes build errors: arch/powerpc/kernel/switch.S:249: Error: operand out of range (0x000000000000fe50 is not between 0xffffffffffff8000 and 0x0000000000007fff) Although the asm could be reworked, in practice a 32KB stack seems sufficient even for KASAN builds - the additional usage seems to be in the 2-3KB range for a 64-bit KASAN build. So only increase the stack for KASAN if the stack size is < 32KB.
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{
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2024-26710"
      ],
      "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/kasan: Limit KASAN thread size increase to 32KB\n\nKASAN is seen to increase stack usage, to the point that it was reported\nto lead to stack overflow on some 32-bit machines (see link).\n\nTo avoid overflows the stack size was doubled for KASAN builds in\ncommit 3e8635fb2e07 (\"powerpc/kasan: Force thread size increase with\nKASAN\").\n\nHowever with a 32KB stack size to begin with, the doubling leads to a\n64KB stack, which causes build errors:\n  arch/powerpc/kernel/switch.S:249: Error: operand out of range (0x000000000000fe50 is not between 0xffffffffffff8000 and 0x0000000000007fff)\n\nAlthough the asm could be reworked, in practice a 32KB stack seems\nsufficient even for KASAN builds - the additional usage seems to be in\nthe 2-3KB range for a 64-bit KASAN build.\n\nSo only increase the stack for KASAN if the stack size is \u003c 32KB.",
      "id": "GSD-2024-26710",
      "modified": "2024-02-20T06:02:29.284827Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@kernel.org",
        "ID": "CVE-2024-26710",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "Linux",
                    "version": {
                      "version_data": [
                        {
                          "version_affected": "\u003c",
                          "version_name": "9ccf64e763ac",
                          "version_value": "4297217bcf1f"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "b38014874530",
                          "version_value": "4cc31fa07445"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "58f396513cb1",
                          "version_value": "b29b16bd836a"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "18f14afe2816",
                          "version_value": "f1acb109505d"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "6.1.75",
                          "version_value": "6.1.79"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "6.6.14",
                          "version_value": "6.6.18"
                        },
                        {
                          "version_affected": "\u003c",
                          "version_name": "6.7.2",
                          "version_value": "6.7.6"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "Linux"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/kasan: Limit KASAN thread size increase to 32KB\n\nKASAN is seen to increase stack usage, to the point that it was reported\nto lead to stack overflow on some 32-bit machines (see link).\n\nTo avoid overflows the stack size was doubled for KASAN builds in\ncommit 3e8635fb2e07 (\"powerpc/kasan: Force thread size increase with\nKASAN\").\n\nHowever with a 32KB stack size to begin with, the doubling leads to a\n64KB stack, which causes build errors:\n  arch/powerpc/kernel/switch.S:249: Error: operand out of range (0x000000000000fe50 is not between 0xffffffffffff8000 and 0x0000000000007fff)\n\nAlthough the asm could be reworked, in practice a 32KB stack seems\nsufficient even for KASAN builds - the additional usage seems to be in\nthe 2-3KB range for a 64-bit KASAN build.\n\nSo only increase the stack for KASAN if the stack size is \u003c 32KB."
          }
        ]
      },
      "generator": {
        "engine": "bippy-5f0117140d9a"
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://git.kernel.org/stable/c/4297217bcf1f0948a19c2bacc6b68d92e7778ad9",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/4297217bcf1f0948a19c2bacc6b68d92e7778ad9"
          },
          {
            "name": "https://git.kernel.org/stable/c/4cc31fa07445879a13750cb061bb8c2654975fcb",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/4cc31fa07445879a13750cb061bb8c2654975fcb"
          },
          {
            "name": "https://git.kernel.org/stable/c/b29b16bd836a838b7690f80e37f8376414c74cbe",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/b29b16bd836a838b7690f80e37f8376414c74cbe"
          },
          {
            "name": "https://git.kernel.org/stable/c/f1acb109505d983779bbb7e20a1ee6244d2b5736",
            "refsource": "MISC",
            "url": "https://git.kernel.org/stable/c/f1acb109505d983779bbb7e20a1ee6244d2b5736"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "cve": {
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/kasan: Limit KASAN thread size increase to 32KB\n\nKASAN is seen to increase stack usage, to the point that it was reported\nto lead to stack overflow on some 32-bit machines (see link).\n\nTo avoid overflows the stack size was doubled for KASAN builds in\ncommit 3e8635fb2e07 (\"powerpc/kasan: Force thread size increase with\nKASAN\").\n\nHowever with a 32KB stack size to begin with, the doubling leads to a\n64KB stack, which causes build errors:\n  arch/powerpc/kernel/switch.S:249: Error: operand out of range (0x000000000000fe50 is not between 0xffffffffffff8000 and 0x0000000000007fff)\n\nAlthough the asm could be reworked, in practice a 32KB stack seems\nsufficient even for KASAN builds - the additional usage seems to be in\nthe 2-3KB range for a 64-bit KASAN build.\n\nSo only increase the stack for KASAN if the stack size is \u003c 32KB."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: powerpc/kasan: limitar el aumento del tama\u00f1o del subproceso KASAN a 32 KB. Se considera que KASAN aumenta el uso de la pila, hasta el punto de que se inform\u00f3 que provoca un desbordamiento de la pila en algunas m\u00e1quinas de 32 bits ( ver enlace). Para evitar desbordamientos, el tama\u00f1o de la pila se duplic\u00f3 para las compilaciones de KASAN en el commit 3e8635fb2e07 (\"powerpc/kasan: Forzar el aumento del tama\u00f1o del subproceso con KASAN\"). Sin embargo, con un tama\u00f1o de pila de 32 KB para empezar, la duplicaci\u00f3n conduce a una pila de 64 KB, lo que provoca errores de compilaci\u00f3n: arch/powerpc/kernel/switch.S:249: Error: operando fuera de rango (0x000000000000fe50 no est\u00e1 entre 0xffffffffffff8000 y 0x00000000000007fff) Aunque el conjunto podr\u00eda modificarse, en la pr\u00e1ctica una pila de 32 KB parece suficiente incluso para compilaciones KASAN; el uso adicional parece estar en el rango de 2 a 3 KB para una compilaci\u00f3n KASAN de 64 bits. Por lo tanto, solo aumente la pila para KASAN si el tama\u00f1o de la pila es \u0026lt;32 KB."
          }
        ],
        "id": "CVE-2024-26710",
        "lastModified": "2024-04-04T14:15:09.567",
        "metrics": {},
        "published": "2024-04-03T15:15:53.487",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/4297217bcf1f0948a19c2bacc6b68d92e7778ad9"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/4cc31fa07445879a13750cb061bb8c2654975fcb"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b29b16bd836a838b7690f80e37f8376414c74cbe"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/f1acb109505d983779bbb7e20a1ee6244d2b5736"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Awaiting Analysis"
      }
    }
  }
}


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