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CVE-2026-90415— RDMA/cxgb4: free STAG index when TPT entry write fails

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： RDMA/cxgb4：当 TPT 条目写入失败时，释放 STAG 索引 使用 分配一个新的 STAG 索引，并在编程条目之前递增 。当 失败时，函数直接返回错误，既未释放已分配的索引，也未回退统计值。由于没有将内存区域（MR）插入到 中，注销操作（deregistration）无法回收该索引，导致索引泄漏，直至设备拆卸（teardown）时才被释放。 修复方案： 记录本次调用是否分配了该索引；在写入失败时，将索引归还给 ，并递减 。回滚操作需同时依据“写入错误”和“该索

AI Predicted 5.5 Difficulty: Hard EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1480 · Execution Guardrails

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux ec3eead217181d7360a11317a888ceb30807867c< 5fe4731bfbd8d83c4a14b4af3a27329969ce8a99 affected
ec3eead217181d7360a11317a888ceb30807867c< 8f6976d635d190e3d7af7103daaa581cf1ccc12e affected
ec3eead217181d7360a11317a888ceb30807867c< 9eeafcda1d6c11f0eec532243c4e96ec8c632bd7 affected
ec3eead217181d7360a11317a888ceb30807867c< 5a21e5114cec4cd3f8a2843d4c46bc49634d6e96 affected
ec3eead217181d7360a11317a888ceb30807867c< 2f17ca7ab5269ac2504e1039c3921373dccd7712 affected
ec3eead217181d7360a11317a888ceb30807867c< a2e37d1ab773be3cd26b1c19593ca2dbcece9c57 affected
ec3eead217181d7360a11317a888ceb30807867c< a64e2beb450179a5d43034af8d5476a11eac1486 affected
ec3eead217181d7360a11317a888ceb30807867c< fdfb5cea4bf070cdb31d997efd87bb684df041fd affected
… +10 more rows
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I. Basic Information for CVE-2026-90415

Vulnerability Information
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Vulnerability Title
RDMA/cxgb4: free STAG index when TPT entry write fails
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux ec3eead217181d7360a11317a888ceb30807867c ~ 5fe4731bfbd8d83c4a14b4af3a27329969ce8a99 -
Linux Linux 3.5 -

II. Public POCs for CVE-2026-90415

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III. Intelligence Information for CVE-2026-90415

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Patches & Fixes for CVE-2026-90415 (8)

Same Patch Batch · Linux · 2026-09-17 · 600 CVEs total

CVE-2026-92489 9.8 CRITICAL xfrm: Fix skb double-free in xfrm_dev_direct_output()
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
CVE-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90104 9.8 CRITICAL NFSv4.1: zero referring call lists before decoding
CVE-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
CVE-2026-90110 9.4 CRITICAL inetpeer: randomize RB-tree node comparison using SipHash
CVE-2026-90230 9.1 CRITICAL nvmet: fix heap out-of-bounds read in nvmet_auth_negotiate()
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID

Showing top 20 of 600 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-90415

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