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 Linux kernel | >=6.6<6.6.54 | |
| Linux Linux kernel | >=6.7<6.10.13 | |
| Linux Linux kernel | >=6.11<6.11.2 |
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Reference Links
- https://git.kernel.org/stable/c/5fe6e308abaea082c20fbf2aa5df8e14495622cf
- https://git.kernel.org/stable/c/790c630ab0e7d7aba6d186581d4627c09fce60f3
- https://git.kernel.org/stable/c/7c1d782e5afbf7c50ba74ecc4ddc18a05d63e5ee
- https://git.kernel.org/stable/c/cdf27834c3dd5d9abf7eb8e4ee87ee9e307eb25c
- 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
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