CVE-2026-90415

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxec3eead217181d7360a11317a888ceb30807867c < 5fe4731bfbd8d83c4a14b4af3a27329969ce8a99affected
LinuxLinuxec3eead217181d7360a11317a888ceb30807867c < 8f6976d635d190e3d7af7103daaa581cf1ccc12eaffected
LinuxLinuxec3eead217181d7360a11317a888ceb30807867c < 9eeafcda1d6c11f0eec532243c4e96ec8c632bd7affected
LinuxLinuxec3eead217181d7360a11317a888ceb30807867c < 5a21e5114cec4cd3f8a2843d4c46bc49634d6e96affected
LinuxLinuxec3eead217181d7360a11317a888ceb30807867c < 2f17ca7ab5269ac2504e1039c3921373dccd7712affected
LinuxLinuxec3eead217181d7360a11317a888ceb30807867c < a2e37d1ab773be3cd26b1c19593ca2dbcece9c57affected
LinuxLinuxec3eead217181d7360a11317a888ceb30807867c < a64e2beb450179a5d43034af8d5476a11eac1486affected
LinuxLinuxec3eead217181d7360a11317a888ceb30807867c < fdfb5cea4bf070cdb31d997efd87bb684df041fdaffected
LinuxLinux3.5affected
LinuxLinux0 < 3.5unaffected
LinuxLinux5.10.270 <= 5.10.*unaffected
LinuxLinux5.15.221 <= 5.15.*unaffected
LinuxLinux6.1.188 <= 6.1.*unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References