CVE-2024-38577 rcu-tasks: Fix show_rcu_tasks_trace_gp_kthread buffer overflow

2024-06-1913:37:35

Linux

www.cve.org

linux kernel

vulnerability

buffer overflow

rcu-tasks

cve-2024-38577

fix

show_rcu_tasks_trace_gp_kthread

snprintf

linux verification center

EPSS

Percentile

5.0%

JSON

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

rcu-tasks: Fix show_rcu_tasks_trace_gp_kthread buffer overflow

There is a possibility of buffer overflow in
show_rcu_tasks_trace_gp_kthread() if counters, passed
to sprintf() are huge. Counter numbers, needed for this
are unrealistically high, but buffer overflow is still
possible.

Use snprintf() with buffer size instead of sprintf().

Found by Linux Verification Center (linuxtesting.org) with SVACE.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/rcu/tasks.h"
    ],
    "versions": [
      {
        "version": "edf3775f0ad6",
        "lessThan": "17c43211d45f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "edf3775f0ad6",
        "lessThan": "af7b560c88fb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "edf3775f0ad6",
        "lessThan": "08186d0c5fb6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "edf3775f0ad6",
        "lessThan": "32d988f48ed2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "edf3775f0ad6",
        "lessThan": "6593d857ce5b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "edf3775f0ad6",
        "lessThan": "1a240e138071",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "edf3775f0ad6",
        "lessThan": "cc5645fddb0c",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/rcu/tasks.h"
    ],
    "versions": [
      {
        "version": "5.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.8",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.226",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.167",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.93",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.33",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.12",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.3",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]