CVE-2024-35955
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Linux kernel Affected 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 6.9 | Affected | — |
| — | Affected | 4.15 |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Mixed 6 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 6.8.9-1 |
| sid | Fixed | 6.8.9-1 |
| forky | Fixed | 6.8.9-1 |
| bullseye | Fixed | 5.10.216-1 |
| bookworm | Fixed | 6.1.90-1 |
| 10.0 | Affected | — |
References
- https://git.kernel.org/stable/c/2df2dd27066cdba8041e46a64362325626bdfb2e
- https://git.kernel.org/stable/c/325f3fb551f8cd672dbbfc4cf58b14f9ee3fc9e8
- https://git.kernel.org/stable/c/36b57c7d2f8b7de224980f1a284432846ad71ca0
- https://git.kernel.org/stable/c/5062d1f4f07facbdade0f402d9a04a788f52e26d
- https://git.kernel.org/stable/c/62029bc9ff2c17a4e3a2478d83418ec575413808
- https://git.kernel.org/stable/c/93eb31e7c3399e326259f2caa17be1e821f5a412
- https://git.kernel.org/stable/c/b5808d40093403334d939e2c3c417144d12a6f33
- https://git.kernel.org/stable/c/d15023fb407337028a654237d8968fefdcf87c2f
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-613116.html
- https://www.suse.com/security/cve/CVE-2024-35955.html
- https://security-tracker.debian.org/tracker/CVE-2024-35955
CWEs
CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.