CVE-2021-47050 memory: renesas-rpc-if: fix possible NULL pointer dereference of resource

2024-02-2808:13:52

Linux

www.cve.org

cve-2021-47050

memory

renesas-rpc-if

vulnerability

linux kernel

platform_get_resource_byname()

resource_size()

addresses-coverity

6.8 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.6%

JSON

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

memory: renesas-rpc-if: fix possible NULL pointer dereference of resource

The platform_get_resource_byname() can return NULL which would be
immediately dereferenced by resource_size(). Instead dereference it
after validating the resource.

Addresses-Coverity: Dereference null return value

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/memory/renesas-rpc-if.c"
    ],
    "versions": [
      {
        "version": "ca7d8b980b67",
        "lessThan": "71bcc1b4a174",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ca7d8b980b67",
        "lessThan": "e16acc3a37f0",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ca7d8b980b67",
        "lessThan": "a74cb41af7db",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ca7d8b980b67",
        "lessThan": "59e27d7c94aa",
        "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/memory/renesas-rpc-if.c"
    ],
    "versions": [
      {
        "version": "5.9",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.9",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.37",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.11.21",
        "lessThanOrEqual": "5.11.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.12.4",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]