CVE-2024-27037 clk: zynq: Prevent null pointer dereference caused by kmalloc failure

2024-05-0112:53:50

Linux

github.com

linux kernel

prevent null pointer

clk zynq

kmalloc failure

cve-2024-27037

AI Score

6.7

Confidence

Low

EPSS

Percentile

10.3%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

clk: zynq: Prevent null pointer dereference caused by kmalloc failure

The kmalloc() in zynq_clk_setup() will return null if the
physical memory has run out. As a result, if we use snprintf()
to write data to the null address, the null pointer dereference
bug will happen.

This patch uses a stack variable to replace the kmalloc().

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "0ee52b157b8e",
        "lessThan": "01511ac7be8e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ee52b157b8e",
        "lessThan": "8c4889a9ea86",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ee52b157b8e",
        "lessThan": "0801c893fd48",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ee52b157b8e",
        "lessThan": "ca976c6a592f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ee52b157b8e",
        "lessThan": "58a946ab4350",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "0ee52b157b8e",
        "lessThan": "7938e9ce39d6",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/clk/zynq/clkc.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.11"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.11",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "5.15.153",
        "versionType": "custom",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.83",
        "versionType": "custom",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.23",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.7.11",
        "versionType": "custom",
        "lessThanOrEqual": "6.7.*"
      },
      {
        "status": "unaffected",
        "version": "6.8.2",
        "versionType": "custom",
        "lessThanOrEqual": "6.8.*"
      },
      {
        "status": "unaffected",
        "version": "6.9",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/clk/zynq/clkc.c"
    ],
    "defaultStatus": "affected"
  }
]