Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: xfrm: Wait for RCU readers during policy netns exit xfrm_policy_fini() frees the policy_bydst hash tables after flushing the policy work items and deleting all policies, but it does not wait for concurrent RCU readers to leave their read-side critical sections first. The policy_bydst tables are published via rcu_assign_pointer() and are looked up through rcu_dereference_check(), so netns teardown must also wait for an RCU grace period before freeing the table memory. Fix this by adding synchronize_rcu() before freeing the policy hash tables.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e1e551bc56302b80ff930c966f9985095fb1b70d before b66920a3348c0f63ba18365248fa21fbf0b3a937; affected e1e551bc56302b80ff930c966f9985095fb1b70d before 438b1f668ad58f46ce699bb48e4698a7839e3f9e; affected e1e551bc56302b80ff930c966f9985095fb1b70d before 3733fce2871c9bca9dd18a1a23b1432ea215a094; affected e1e551bc56302b80ff930c966f9985095fb1b70d before 33a3149dd81a1e2f52b80ee1e0fc380b39f3d028; affected e1e551bc56302b80ff930c966f9985095fb1b70d before 069daad4f2ae9c5c108131995529d5f02392c446 |
| Linux / Linux | affected 4.9; unaffected 0 before 4.9; unaffected 6.6.136 through 6.6.*; unaffected 6.12.83 through 6.12.*; unaffected 6.18.24 through 6.18.*; unaffected 6.19.14 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b66920a3348c0f63ba18365248fa21fbf0b3a937
- https://git.kernel.org/stable/c/438b1f668ad58f46ce699bb48e4698a7839e3f9e
- https://git.kernel.org/stable/c/3733fce2871c9bca9dd18a1a23b1432ea215a094
- https://git.kernel.org/stable/c/33a3149dd81a1e2f52b80ee1e0fc380b39f3d028
- https://git.kernel.org/stable/c/069daad4f2ae9c5c108131995529d5f02392c446
ADP enrichment
No English description supplied.
No references supplied.