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CVE-2024-35955 In the Linux kernel, the following vulnerability has been resolved: kprobes: Fix possible use-after-free issue on kprobe…

Description

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.

Produits et versions touchés

Produit Versions touchées Corrigé en
Linux 6.9 premières → < 6.9 6.9
Linux 6.8 premières → < 6.8.7 6.8.7
Linux 6.6 premières → < 6.6.28 6.6.28
Linux 6.1 premières → < 6.1.87 6.1.87
Linux 6.0 Pas de correctif indiqué
Linux 5.15 premières → < 5.15.157 5.15.157
Linux 5.10 premières → < 5.10.216 5.10.216
Linux 5.4 premières → < 5.4.275 5.4.275
Linux 4.19 premières → < 4.19.313 4.19.313
Afficher les 5 autres branches
Produit Versions touchées Corrigé en
linux_kernel 6.0 Pas de correctif indiqué
RUGGEDCOM RST2428P 3.1 premières → < 3.1 3.1
SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family Versions non publiées
SCALANCE XCM-/XRM-/XCH-/XRH-300 family 3.1 premières → < 3.1 3.1
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem 1.1 premières → < 1.1.1 1.1.1

Références

Chronologie

  1. Publiée
  2. Dernière modification

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