CVE-2024-35955

2024-05-2010:15:10

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux kernel

kprobes

vulnerability

resolution

cve-2024-35955

module state

use-after-free

nvd

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.0%

JSON

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

kprobes: Fix possible use-after-free issue on kprobe registration

When unloading a module, its state is changing MODULE_STATE_LIVE ->
MODULE_STATE_GOING -> MODULE_STATE_UNFORMED. Each change will take
a time. is_module_text_address() and __module_text_address()
works with MODULE_STATE_LIVE and MODULE_STATE_GOING.
If we use is_module_text_address() and __module_text_address()
separately, there is a chance that the first one is succeeded but the
next one is failed because module->state becomes MODULE_STATE_UNFORMED
between those operations.

In check_kprobe_address_safe(), if the second __module_text_address()
is failed, that is ignored because it expected a kernel_text address.
But it may have failed simply because module->state has been changed
to MODULE_STATE_UNFORMED. In this case, arm_kprobe() will try to modify
non-exist module text address (use-after-free).

To fix this problem, we should not use separated is_module_text_address()
and __module_text_address(), but use only __module_text_address()
once and do try_module_get(module) which is only available with
MODULE_STATE_LIVE.

Affected configurations

Vulners

Node

linuxlinux_kernelRange6.0–4.19.313

linuxlinux_kernelRange4.20.0–5.4.275

linuxlinux_kernelRange5.5.0–5.10.216

linuxlinux_kernelRange5.11.0–5.15.157

linuxlinux_kernelRange5.16.0–6.1.87

linuxlinux_kernelRange6.2.0–6.6.28

linuxlinux_kernelRange6.7.0–6.8.7

linuxlinux_kernelRange6.9.0≥

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "kernel/kprobes.c"
    ],
    "versions": [
      {
        "version": "1c836bad43f3",
        "lessThan": "b5808d400934",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "6a119c1a584a",
        "lessThan": "93eb31e7c339",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2a49b025c36a",
        "lessThan": "5062d1f4f07f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "a1edb85e60fd",
        "lessThan": "2df2dd27066c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "28f6c37a2910",
        "lessThan": "62029bc9ff2c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "28f6c37a2910",
        "lessThan": "d15023fb4073",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "28f6c37a2910",
        "lessThan": "36b57c7d2f8b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "28f6c37a2910",
        "lessThan": "325f3fb551f8",
        "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/kprobes.c"
    ],
    "versions": [
      {
        "version": "6.0",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.0",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.313",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.275",
        "lessThanOrEqual": "5.4.*",
        "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": "6.1.87",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.28",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.7",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]