CVE-2025-37846 (GCVE-0-2025-37846)
Vulnerability from cvelistv5
Published
2025-05-09 06:41
Modified
2025-05-26 05:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: arm64: mops: Do not dereference src reg for a set operation The source register is not used for SET* and reading it can result in a UBSAN out-of-bounds array access error, specifically when the MOPS exception is taken from a SET* sequence with XZR (reg 31) as the source. Architecturally this is the only case where a src/dst/size field in the ESR can be reported as 31. Prior to 2de451a329cf662b the code in do_el0_mops() was benign as the use of pt_regs_read_reg() prevented the out-of-bounds access.
References
Impacted products
Vendor Product Version
Linux Linux Version: 2de451a329cf662beeba71f63c7f83ee24ca6642
Version: 2de451a329cf662beeba71f63c7f83ee24ca6642
Version: 2de451a329cf662beeba71f63c7f83ee24ca6642
Version: 2de451a329cf662beeba71f63c7f83ee24ca6642
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/include/asm/traps.h"
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          "vendor": "Linux",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "6.7"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.24",
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                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mops: Do not dereference src reg for a set operation\n\nThe source register is not used for SET* and reading it can result in\na UBSAN out-of-bounds array access error, specifically when the MOPS\nexception is taken from a SET* sequence with XZR (reg 31) as the\nsource. Architecturally this is the only case where a src/dst/size\nfield in the ESR can be reported as 31.\n\nPrior to 2de451a329cf662b the code in do_el0_mops() was benign as the\nuse of pt_regs_read_reg() prevented the out-of-bounds access."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-26T05:22:10.850Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/eec737e17e5567e08148550a7f1d94d495b9fb17"
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/a13bfa4fe0d6949cea14718df2d1fe84c38cd113"
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      ],
      "title": "arm64: mops: Do not dereference src reg for a set operation",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-37846",
    "datePublished": "2025-05-09T06:41:54.648Z",
    "dateReserved": "2025-04-16T04:51:23.953Z",
    "dateUpdated": "2025-05-26T05:22:10.850Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-37846\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-09T07:16:05.430\",\"lastModified\":\"2025-05-12T17:32:52.810\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\narm64: mops: Do not dereference src reg for a set operation\\n\\nThe source register is not used for SET* and reading it can result in\\na UBSAN out-of-bounds array access error, specifically when the MOPS\\nexception is taken from a SET* sequence with XZR (reg 31) as the\\nsource. Architecturally this is the only case where a src/dst/size\\nfield in the ESR can be reported as 31.\\n\\nPrior to 2de451a329cf662b the code in do_el0_mops() was benign as the\\nuse of pt_regs_read_reg() prevented the out-of-bounds access.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: arm64: mops: No desreferenciar el registro src para una operaci\u00f3n set. El registro fuente no se utiliza para SET* y leerlo puede resultar en un error de acceso a la matriz UBSAN fuera de los l\u00edmites, espec\u00edficamente cuando la excepci\u00f3n MOPS se toma de una secuencia SET* con XZR (reg 31) como origen. Arquitect\u00f3nicamente, este es el \u00fanico caso donde un campo src/dst/size en el ESR puede reportarse como 31. Antes de 2de451a329cf662b, el c\u00f3digo en do_el0_mops() era benigno ya que el uso de pt_regs_read_reg() imped\u00eda el acceso fuera de los l\u00edmites.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/43267d934eacff6c70e15545d804ebbcab8a0bf5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5f6022a74147675124b781fdc056b291850e7786\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a13bfa4fe0d6949cea14718df2d1fe84c38cd113\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eec737e17e5567e08148550a7f1d94d495b9fb17\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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