IT

Tracker / CVE-2025-38212

CVE-2025-38212

High 7.8

In the Linux kernel, the following vulnerability has been resolved: ipc: fix to protect IPCS lookups using RCU syzbot reported that it discovered a use-after-free vulnerability, [0] [0]: https://lore.kernel.org/all/67af13f8.050a0220.21dd3.0038.GAE@google.com/ idr_for_each() is protected by rwsem, but this is not enough. If it is not protected by RCU read-critical region, when idr_for_each() calls radix_tree_node_free() through call_rcu() to free the radix_tree_node structure, the node will be freed immediately, and when reading the next node in radix_tree_for_each_slot(), the already freed memory may be read. Therefore, we need to add code to make sure that idr_for_each() is protected within the RCU read-critical region when we call it in shm_destroy_orphaned().

Affected products and versions

debian debian_linux
linux linux_kernel · 3.1 → 5.4.295
linux linux_kernel · 5.11 → 5.15.186
linux linux_kernel · 5.16 → 6.1.142
linux linux_kernel · 5.5 → 5.10.239
linux linux_kernel · 6.13 → 6.15.4
linux linux_kernel · 6.2 → 6.6.95
linux linux_kernel · 6.7 → 6.12.35

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References