Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: RDMA/srpt: Fix srpt_alloc_rw_ctxs() unwind counters When srpt_alloc_rw_ctxs() fails partway through a multi-buffer indirect descriptor, the unwind path destroys RDMA contexts but leaves stale n_rw_ctx and n_rdma values (and a dangling rw_ctxs pointer). Later sq_wr_avail accounting in srpt_queue_response() or srpt_write_pending() can then subtract the wrong number of send queue credits. Reset the counters and clear rw_ctxs after freeing the heap allocation before returning an error.

Affected versions

Linux: b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 through before af00051dbc9f467d4840ec709680660a3f8990fa (git); b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 through before 717ab4d0614e9446bf8e2de6229464499e4008d6 (git); b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 through before f1f2252da52cdda912da9993f39f58783b01b38f (git); b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 through before f65f45dfa1e6e2eaa9e11c8b8ce8857799cb189d (git); b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 through before be1478849e1abb1e12dc12e14cdbf800cc6fa99a (git); b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 through before af073bd245180393bcb15d33d3990a6bdc32593a (git); b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 through before bd02d644bd19a2795c018635d273d91e45d2bb95 (git); b99f8e4d7bcd3bfbb3cd965918523299370d0cb2 through before b38f98e176050850f41bb6415f3a71400056623e (git); 4.7 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.