CVE-2025-38212 In the Linux kernel, the following vulnerability has been resolved: ipc: fix to protect IPCS lookups using RCU syzbot…
Description
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
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux 6.16 | earliest → < 6.16 | 6.16 |
| Linux 6.15 | earliest → < 6.15.4 | 6.15.4 |
| Linux 6.12 | earliest → < 6.12.35 | 6.12.35 |
| Linux 6.6 | earliest → < 6.6.95 | 6.6.95 |
| Linux 6.1 | earliest → < 6.1.142 | 6.1.142 |
| Linux 5.15 | earliest → < 5.15.186 | 5.15.186 |
| Linux 5.10 | earliest → < 5.10.239 | 5.10.239 |
| Linux 5.4 | earliest → < 5.4.295 | 5.4.295 |
| Linux | 3.1 | No fix stated |
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| Product | Affected versions | Fixed in |
|---|---|---|
| SIMATIC S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.5 → latest | No fix stated |
| SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP 3.1 | 3.1.5 → latest | No fix stated |
| SIPLUS S7-1500 CPU 1518-4 PN/DP MFP 3.1 | 3.1.5 → latest | No fix stated |