7.8
Élevée
CVE-2023-4208 A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local…
Description
A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free. We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81.
Produits et versions touchés
| Produit | Versions touchées | Corrigé en |
|---|---|---|
| kernel 3.18 | 3.18 → < 6.5 | 6.5 |
Références
- git.kernel.org git.kernel.org
- kernel.dance kernel.dance
- www.debian.org www.debian.org
- lists.debian.org lists.debian.org
Chronologie
- Publiée
- Dernière modification
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