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.
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.
Metrics
Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 17 Sep 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | RDMA/cxgb4: free STAG index when TPT entry write fails | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
|
|
Projects
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MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-09-17T16:09:40.714Z
Reserved: 2026-09-11T19:38:34.813Z
Link: CVE-2026-90415
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-17T17:17:45.647
Modified: 2026-09-17T17:17:45.647
Link: CVE-2026-90415
Redhat
No data.
OpenCVE Enrichment
No data.
Weaknesses
No weakness.