CVE-2026-90415

In the Linux kernel, the following vulnerability has been resolved:

RDMA/cxgb4: free STAG index when TPT entry write fails

write_tpt_entry() allocates a new STAG index with c4iw_get_resource() and

bumps stats.stag.cur before programming the entry. When

write_adapter_mem() fails, it returns the error without releasing the index

or reversing the statistic. No MR is inserted into rhp->mrs, so

deregistration never reclaims it, leaking the index until device teardown.

Record whether this call allocated the index and, on a failed write, return

it to tpt_table and decrement stats.stag.cur. Key the rollback on both the

write error and that flag, not the error alone: a non-reset update carries

a caller-owned STAG that this call did not allocate and must not free.