CVE-2024-35955

High

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.

Package Linux Kernel
Published 2024-05-20
Last modified 2026-05-12
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

8.8

out of 10
High
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-416

CVE-2024-35955 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.19.256, 5.4.211, 5.10.137, 5.15.61, 4.14.291, 5.18.18, 5.19.2, 6.0 and later are affected. Fixed in 4.19.313, 5.4.275, 5.10.216, 5.15.157, 6.1.87, 6.6.28, 6.8.7, 6.9 and their respective stable series.

Affected from
≥ 4.19.256 ≥ 5.4.211 ≥ 5.10.137 ≥ 5.15.61 ≥ 4.14.291 ≥ 5.18.18 ≥ 5.19.2 ≥ 6.0
Fixed in
✓ 4.19.313 4.19.x ✓ 5.4.275 5.4.x ✓ 5.10.216 5.10.x ✓ 5.15.157 5.15.x ✓ 6.1.87 6.1.x ✓ 6.6.28 6.6.x ✓ 6.8.7 6.8.x ✓ 6.9

References

12 total
Showing 5 of 12 references View all on NVD

Frequently asked questions

  • What is CVE-2024-35955?

    CVE-2024-35955 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 4.19.256 onward and has been patched in 4.19.313, 5.4.275, 5.10.216 and others. CVE-2024-35955 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2024-35955?

    CVE-2024-35955 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2024-35955?

    Yes. CVE-2024-35955 has been patched. Fixed versions include 4.19.313, 5.4.275, 5.10.216 and others. If you are running Linux kernel 4.19.256 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2024-35955 actively exploited?

    No. CVE-2024-35955 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Back to
All CVEs
View on
NVD / NIST