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CVE-2026-93103— RDMA/hfi1: Preserve unit 0 on allocation failure

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，已修复以下漏洞： RDMA/hfi1：在分配失败时保留 unit 0 假设设备已被插入到 unit 表中，并会无条件地清除 。如果 调用失败，零初始化的 unit 值仍保持为 0，因此完整的清理流程可能会错误地从索引 0 处移除一个不相关的设备。 应在 unit 表尚未获取该设备的情况下，仅释放 的分配并立即返回。

AI Predicted 4.4 Difficulty: Hard EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 03b92789e5cfdac66805c1a98f1ec67336199d56< 852637d3ee56aed8ea3ee8948eda21eca406c051 affected
03b92789e5cfdac66805c1a98f1ec67336199d56< 3d0e5252b8d0345ef494763ca31e3ddd666e02cb affected
03b92789e5cfdac66805c1a98f1ec67336199d56< 0feb29d434e6cc0ebefec4f77be014c85ad751b0 affected
03b92789e5cfdac66805c1a98f1ec67336199d56< 3f1e196eb66b8cd3882e373794d6cea46f150a20 affected
03b92789e5cfdac66805c1a98f1ec67336199d56< 4ff9d58d34758e9633078b37e8d5289b513ff80e affected
03b92789e5cfdac66805c1a98f1ec67336199d56< fd4d3ad5f244a867166d1e2da7ece3d82878ec81 affected
03b92789e5cfdac66805c1a98f1ec67336199d56< 4204f5c0312ba136181a6e148ffa0bfaf95a4cc1 affected
03b92789e5cfdac66805c1a98f1ec67336199d56< 2e3809ad8911f5d5581b3f046bd628417bface76 affected
… +10 more rows
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I. Basic Information for CVE-2026-93103

Vulnerability Information
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Vulnerability Title
RDMA/hfi1: Preserve unit 0 on allocation failure
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/hfi1: Preserve unit 0 on allocation failure hfi1_free_devdata() assumes that the device was inserted into the unit table and unconditionally erases dd->unit. If xa_alloc_irq() fails, the zero-initialized unit remains zero, so full cleanup can remove an unrelated device from index 0. Release only the rdmavt allocation and return immediately while the unit table has not acquired the device.
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 03b92789e5cfdac66805c1a98f1ec67336199d56 ~ 852637d3ee56aed8ea3ee8948eda21eca406c051 -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-93103

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III. Intelligence Information for CVE-2026-93103

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Patches & Fixes for CVE-2026-93103 (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-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
CVE-2026-90235 9.8 CRITICAL sunrpc: xprtsock: annotate shared socket callbacks with READ_ONCE/WRITE_ONCE
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-2026-90286 8.8 HIGH drm/amdgpu/gfx6: Use PFP on the compute queues too
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90240 8.8 HIGH iommu/vt-d: Flush context cache with correct SID when tearing down aliases
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

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