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CVE-2024-35955

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.19.313, 5.4.275, 5.10.216, 5.15.157, 4.15, and 5 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 1c836bad43f3e2ff71cc397a6e6ccb4e7bd116f8 · fixed in b5808d40093403334d939e2c3c417144d12a6f33; From 6a119c1a584aa7a2c6216458f1f272bf1bc93a93 · fixed in 93eb31e7c3399e326259f2caa17be1e821f5a412; From 2a49b025c36ae749cee7ccc4b7e456e02539cdc3 · fixed in 5062d1f4f07facbdade0f402d9a04a788f52e26d; From a1edb85e60fdab1e14db63ae8af8db3f0d798fb6 · fixed in 2df2dd27066cdba8041e46a64362325626bdfb2e; From 28f6c37a2910f565b4f5960df52b2eccae28c891 · fixed in 62029bc9ff2c17a4e3a2478d83418ec575413808; From 28f6c37a2910f565b4f5960df52b2eccae28c891 · fixed in d15023fb407337028a654237d8968fefdcf87c2f; From 28f6c37a2910f565b4f5960df52b2eccae28c891 · fixed in 36b57c7d2f8b7de224980f1a284432846ad71ca0; From 28f6c37a2910f565b4f5960df52b2eccae28c891 · fixed in 325f3fb551f8cd672dbbfc4cf58b14f9ee3fc9e8; From 4.19.256 · fixed in 4.19.313; From 5.4.211 · fixed in 5.4.275; From 5.10.137 · fixed in 5.10.216; From 5.15.61 · fixed in 5.15.157; From 4.14.291 · fixed in 4.15; From 5.18.18 · fixed in 5.19; From 5.19.2 · fixed in 5.20

  • Linux Linux

    6.0

  • KernelLinux

    fixed in 4.19.313; From 4.20.0 · fixed in 5.4.275; From 5.5.0 · fixed in 5.10.216; From 5.11.0 · fixed in 5.15.157; From 5.16.0 · fixed in 6.1.87; From 6.0.0 · fixed in 6.6.28; From 6.2.0 · fixed in 6.8.7

References 8

git.kernel.org