RDMA/cxgb4: free STAG index when TPT entry write fails
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 7 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6, 7.3
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 4 | Affected | No fix yet: Fix deferred |
| Red Hat OpenShift Container Platform 5 | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-90415
- 2026-10-03 Alias added: GHSA-v598-vrqp-g6vj
- 2026-10-06 Affected versions changed · Red Hat
- 2026-10-06 CVSS score added · Red Hat
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-07 Affected versions changed · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/5fe4731bfbd8d83c4a14b4af3a27329969ce8a99
- https://git.kernel.org/stable/c/8f6976d635d190e3d7af7103daaa581cf1ccc12e
- https://git.kernel.org/stable/c/9eeafcda1d6c11f0eec532243c4e96ec8c632bd7
- https://git.kernel.org/stable/c/5a21e5114cec4cd3f8a2843d4c46bc49634d6e96
- https://git.kernel.org/stable/c/2f17ca7ab5269ac2504e1039c3921373dccd7712
- https://git.kernel.org/stable/c/a2e37d1ab773be3cd26b1c19593ca2dbcece9c57
- https://git.kernel.org/stable/c/a64e2beb450179a5d43034af8d5476a11eac1486
- https://git.kernel.org/stable/c/fdfb5cea4bf070cdb31d997efd87bb684df041fd
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Sources
- CVE-2026-90415 · CVE Program
- CVE-2026-90415 · NVD
- FIRST EPSS
- GHSA-v598-vrqp-g6vj · GitHub Advisory Database · CC BY 4.0
- CVE-2026-90415 · Red Hat security data · CC BY 4.0
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