Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: RDMA/mad: Fix receive buffer leak when PKey enforcement fails ib_mad_complete_recv() initializes mad_recv_wc->rmpp_list and then runs ib_mad_enforce_security() before linking recv_buf onto that list. On failure it calls ib_free_recv_mad(), which only walks rmpp_list and frees the ib_mad_private of every buffer found there. As the list is still empty at that point, nothing is freed at all. The caller cannot clean up either: ib_mad_recv_done() sets recv to NULL right after ib_mad_complete_recv() returns, assuming the MAD layer took ownership of the buffer. Every MAD that fails the PKey check therefore leaks one ib_mad_private (about 300 bytes per IB port MAD, ~2K for OPA), and a remote node can trigger this repeatedly by sending MADs with a wrong PKey. Link recv_buf onto rmpp_list right after the list is initialized, so the error path has something to free.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 47a2b338fe63200d716d2e24131cdb49f17c77da before 4617c9a856188674dddb0ca66979746d07688579; affected 47a2b338fe63200d716d2e24131cdb49f17c77da before 8e2036fb47a5b152d53eadbd35abf311bd34cc7f; affected 47a2b338fe63200d716d2e24131cdb49f17c77da before bad289e42f512646a988f278f536d21547df73f1; affected 47a2b338fe63200d716d2e24131cdb49f17c77da before 752b30e9d339008e5ce7eed412e9446078916129; affected 47a2b338fe63200d716d2e24131cdb49f17c77da before 39c4ea72a40503e102ae07e6776005f96ca078a6; affected 47a2b338fe63200d716d2e24131cdb49f17c77da before 5091e25ec503f7fc02723ca435226467b68caac7; affected 47a2b338fe63200d716d2e24131cdb49f17c77da before c0d8df85db146d6275e226cb950023be69dd6c77; affected 47a2b338fe63200d716d2e24131cdb49f17c77da before 3476c28c9addfa253f505e6bd87f1f5598b961d0 |
| Linux / Linux | affected 4.13; unaffected 0 before 4.13; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/4617c9a856188674dddb0ca66979746d07688579
- https://git.kernel.org/stable/c/8e2036fb47a5b152d53eadbd35abf311bd34cc7f
- https://git.kernel.org/stable/c/bad289e42f512646a988f278f536d21547df73f1
- https://git.kernel.org/stable/c/752b30e9d339008e5ce7eed412e9446078916129
- https://git.kernel.org/stable/c/39c4ea72a40503e102ae07e6776005f96ca078a6
- https://git.kernel.org/stable/c/5091e25ec503f7fc02723ca435226467b68caac7
- https://git.kernel.org/stable/c/c0d8df85db146d6275e226cb950023be69dd6c77
- https://git.kernel.org/stable/c/3476c28c9addfa253f505e6bd87f1f5598b961d0