CVE-2021-47609 firmware: arm_scpi: Fix string overflow in SCPI genpd driver

2024-06-1914:57:59

Linux

www.cve.org

cve-2021-47609

firmware

arm_scpi

string overflow

scpi genpd driver

linux kernel

vulnerability

bound checks

buffer overflow

devm_kasprintf

dynamically allocated buffer

EPSS

Percentile

10.3%

JSON

In the Linux kernel, the following vulnerability has been resolved:

firmware: arm_scpi: Fix string overflow in SCPI genpd driver

Without the bound checks for scpi_pd->name, it could result in the buffer
overflow when copying the SCPI device name from the corresponding device
tree node as the name string is set at maximum size of 30.

Let us fix it by using devm_kasprintf so that the string buffer is
allocated dynamically.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/firmware/scpi_pm_domain.c"
    ],
    "versions": [
      {
        "version": "8bec4337ad40",
        "lessThan": "639901b9429a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8bec4337ad40",
        "lessThan": "4694b1ec425a",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8bec4337ad40",
        "lessThan": "7e8645ca2c00",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8bec4337ad40",
        "lessThan": "802a1a850156",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8bec4337ad40",
        "lessThan": "f0f484714f35",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8bec4337ad40",
        "lessThan": "976389cbb16c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8bec4337ad40",
        "lessThan": "865ed67ab955",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/firmware/scpi_pm_domain.c"
    ],
    "versions": [
      {
        "version": "4.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "4.8",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.9.294",
        "lessThanOrEqual": "4.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.14.259",
        "lessThanOrEqual": "4.14.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.222",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.168",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.88",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.11",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.16",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]