CVE-2024-47675: bpf: Fix use-after-free in bpf_uprobe_multi_link_attach()
First published: Mon Oct 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix use-after-free in bpf_uprobe_multi_link_attach() If bpf_link_prime() fails, bpf_uprobe_multi_link_attach() goes to the error_free label and frees the array of bpf_uprobe's without calling bpf_uprobe_unregister(). This leaks bpf_uprobe->uprobe and worse, this frees bpf_uprobe->consumer without removing it from the uprobe->consumers list.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux kernel | >=6.6<6.6.54 | |
| Linux kernel | >=6.7<6.10.13 | |
| Linux kernel | >=6.11<6.11.2 | |
| Linux Kernel | >=6.6<6.6.54 | |
| Linux Kernel | >=6.7<6.10.13 | |
| Linux Kernel | >=6.11<6.11.2 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.20-1 6.12.21-1 |
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Reference Links
- https://git.kernel.org/stable/c/790c630ab0e7d7aba6d186581d4627c09fce60f3
- https://git.kernel.org/stable/c/7c1d782e5afbf7c50ba74ecc4ddc18a05d63e5ee
- https://git.kernel.org/stable/c/cdf27834c3dd5d9abf7eb8e4ee87ee9e307eb25c
- https://git.kernel.org/stable/c/5fe6e308abaea082c20fbf2aa5df8e14495622cf
- https://lore.kernel.org/linux-cve-announce/2024102103-CVE-2024-47675-643d@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:10942
- https://access.redhat.com/errata/RHSA-2024:11486
- https://bugzilla.redhat.com/show_bug.cgi?id=2320254
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-47675
- https://nvd.nist.gov/vuln/detail/CVE-2024-47675
- https://launchpad.net/bugs/cve/CVE-2024-47675
- https://security-tracker.debian.org/tracker/CVE-2024-47675
- https://ubuntu.com/security/CVE-2024-47675
- https://git.kernel.org/linus/5fe6e308abaea082c20fbf2aa5df8e14495622cf
Frequently Asked Questions
What is the severity of CVE-2024-47675?
CVE-2024-47675 has a severity rating that indicates a potential risk for a use-after-free vulnerability in the Linux kernel.
How do I fix CVE-2024-47675?
To fix CVE-2024-47675, upgrade the Linux kernel to a version that patches the vulnerability.
Which versions of the Linux kernel are affected by CVE-2024-47675?
CVE-2024-47675 affects Linux kernel versions from 6.6 to 6.6.54, 6.7 to 6.10.13, and 6.11 to 6.11.2.
What is a use-after-free vulnerability in the context of CVE-2024-47675?
In the context of CVE-2024-47675, a use-after-free vulnerability allows a program to access memory that has already been freed, potentially leading to security issues.
Is CVE-2024-47675 easily exploitable?
Exploitation of CVE-2024-47675 may require specific conditions, so its ease of exploitation depends on the environment and usage of the affected kernel functions.
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