Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: xfrm: iptfs: reset runtime state when cloning SAs iptfs_clone_state() clones the IPTFS mode data with kmemdup(). This copies runtime objects which must not be shared with the original SA, including the embedded sk_buff_head, hrtimers, spinlock, and in-flight reassembly/reorder state. If xfrm_state_migrate() fails after clone_state() but before the later init_state() call has reinitialized those fields, the cloned state can be destroyed by xfrm_state_gc_task() with list and timer state copied from the original SA. With queued packets this lets the clone splice and free skbs owned by the original IPTFS queue, leading to use-after-free and double-free reports in iptfs_destroy_state() and skb release paths. Reinitialize the clone's runtime state before publishing it through x->mode_data. Because clone_state() now publishes a destroyable mode_data object before init_state(), take the mode callback module reference there. Avoid taking it again from __iptfs_init_state() for the same object.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0e4fbf013fa566f274ce9b4ce698c75b1f998c52 before 9327252e04626d4bb02ca8c0c108fbe8eabf0c5a; affected 0e4fbf013fa566f274ce9b4ce698c75b1f998c52 before dfb9f6cbfa9826655a49698cf90eb800fce2178e; affected 0e4fbf013fa566f274ce9b4ce698c75b1f998c52 before 7f83d174073234839aea176f265e517e0d50a1d2 |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.18.35 through 6.18.*; unaffected 7.0.12 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.