Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: hsr: defer node table free until after RCU readers HSR node-list and node-status generic-netlink operations run under rcu_read_lock(). They walk hsr->node_db through hsr_get_next_node() and hsr_get_node_data(), but RTM_DELLINK teardown removes the same node table with plain list_del() and frees each node immediately. That lets a generic-netlink reader hold a struct hsr_node pointer across hsr_dellink(). In a KASAN build, widening the reader window after hsr_get_next_node() obtains the node reproduces a slab-use-after-free when the reader copies node->macaddress_A; the freeing stack is hsr_del_nodes() from hsr_dellink(). Use list_del_rcu() and defer the free through the existing hsr_free_node_rcu() callback. This matches the lifetime rule used by the HSR prune paths, which already delete nodes with list_del_rcu() and call_rcu().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b9a1e627405d68d475a3c1f35e685ccfb5bbe668 before 0ea70fb46940620848c08d9d399455c9e82fecdb; affected b9a1e627405d68d475a3c1f35e685ccfb5bbe668 before 8be6685cdd1255bcc85f9b59e4bfc313aefc5c1b; affected b9a1e627405d68d475a3c1f35e685ccfb5bbe668 before c5580114e0492bcd2e0a37613ed4c311e3fa3d4d; affected b9a1e627405d68d475a3c1f35e685ccfb5bbe668 before 7713f4aafb577ff49fa67f0488d9c7dddc64d6ce; affected b9a1e627405d68d475a3c1f35e685ccfb5bbe668 before 6324423a8e6591f41a16c09a8f9a84e554ac147c; affected b9a1e627405d68d475a3c1f35e685ccfb5bbe668 before 48d09dea506de667eb55f939bf98eec721effbdb; affected b9a1e627405d68d475a3c1f35e685ccfb5bbe668 before 8c3af18bb0d7c921a5219194037509463eb2ffde; affected b9a1e627405d68d475a3c1f35e685ccfb5bbe668 before aaec7096f9961eb223b5b149abe9495525c205d9; affected 08523d5a2f4a9e4202e00d282c164d453cabe2d2; affected 5.2.12 before 5.3 |
| Linux / Linux | affected 5.3; unaffected 0 before 5.3; unaffected 5.10.259 through 5.10.*; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.93 through 6.12.*; unaffected 6.18.57 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/0ea70fb46940620848c08d9d399455c9e82fecdb
- https://git.kernel.org/stable/c/8be6685cdd1255bcc85f9b59e4bfc313aefc5c1b
- https://git.kernel.org/stable/c/c5580114e0492bcd2e0a37613ed4c311e3fa3d4d
- https://git.kernel.org/stable/c/7713f4aafb577ff49fa67f0488d9c7dddc64d6ce
- https://git.kernel.org/stable/c/6324423a8e6591f41a16c09a8f9a84e554ac147c
- https://git.kernel.org/stable/c/48d09dea506de667eb55f939bf98eec721effbdb
- https://git.kernel.org/stable/c/8c3af18bb0d7c921a5219194037509463eb2ffde
- https://git.kernel.org/stable/c/aaec7096f9961eb223b5b149abe9495525c205d9
ADP enrichment
No English description supplied.
No references supplied.