CVE-2024-26988 init/main.c: Fix potential static_command_line memory overflow

2024-05-0105:27:39

Linux

www.cve.org

vulnerability

resolution

memory overflow

linux kernel

static command line

patch

miss-consolidated

return value

7.7 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

10.5%

JSON

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

init/main.c: Fix potential static_command_line memory overflow

We allocate memory of size ‘xlen + strlen(boot_command_line) + 1’ for
static_command_line, but the strings copied into static_command_line are
extra_command_line and command_line, rather than extra_command_line and
boot_command_line.

When strlen(command_line) > strlen(boot_command_line), static_command_line
will overflow.

This patch just recovers strlen(command_line) which was miss-consolidated
with strlen(boot_command_line) in the commit f5c7310ac73e (“init/main: add
checks for the return value of memblock_alloc*()”)

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "init/main.c"
    ],
    "versions": [
      {
        "version": "f5c7310ac73e",
        "lessThan": "2ef607ea1036",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f5c7310ac73e",
        "lessThan": "0dc727a4e054",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f5c7310ac73e",
        "lessThan": "76c2f4d426a5",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f5c7310ac73e",
        "lessThan": "81cf85ae4f2d",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f5c7310ac73e",
        "lessThan": "936a02b5a963",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "f5c7310ac73e",
        "lessThan": "46dad3c1e578",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "init/main.c"
    ],
    "versions": [
      {
        "version": "5.1",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.1",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.216",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.157",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.88",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.29",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.8",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]