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CVE-2026-93110— RDMA/core: Wait for RCU callbacks before unloading ib_core

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/core：在卸载 ib_core 模块前等待 RCU 回调 通过 排队调用，并实现在 模块中。 停止工作队列（workqueues）并不会排空（drain）已经排队的回调，因此 RCU 可能会在模块代码被卸载之后才调用该回调。 注意： 本身并不等待已排队的回调执行。必须确保所有生产者（producers）都已停止后，再显式等待这些回调完成。

AI Predicted 5.5 Difficulty: Hard EPSS 0.22% · P11

Possible ATT&CK Techniques 1 AI

T1562.008

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 943bd984b108b3bb778790c2da4ae8d186b547e6< 82dfd1df456227279b1c8c648983a530f2612098 affected
943bd984b108b3bb778790c2da4ae8d186b547e6< 1646e123e56c3ad679fbfb571e8eef6386efb729 affected
943bd984b108b3bb778790c2da4ae8d186b547e6< 8e4f1677c09d75d738099f42afcf65d8587b664a affected
943bd984b108b3bb778790c2da4ae8d186b547e6< 7853af5f15738dc00aebaa1fc9f1f0df40f6f603 affected
943bd984b108b3bb778790c2da4ae8d186b547e6< 0d5817fa4819abdc445fa77b5be4f0d49334a864 affected
943bd984b108b3bb778790c2da4ae8d186b547e6< 9d998297fdaf47492f6679287f6552879d1a7e3a affected
943bd984b108b3bb778790c2da4ae8d186b547e6< 48b72fa0d209a92fb51b834a6080171cfa207b2c affected
943bd984b108b3bb778790c2da4ae8d186b547e6< 7d75592114d1664623c8cf191a12b38052c04483 affected
… +10 more rows
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I. Basic Information for CVE-2026-93110

Vulnerability Information
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Vulnerability Title
RDMA/core: Wait for RCU callbacks before unloading ib_core
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Wait for RCU callbacks before unloading ib_core put_gid_ndev() is queued with call_rcu() and implemented in ib_core. Stopping the workqueues does not drain callbacks already queued, so RCU could invoke it after the module code has been unloaded. synchronize_rcu() does not wait for callbacks. Wait for them after all producers have stopped.
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 943bd984b108b3bb778790c2da4ae8d186b547e6 ~ 82dfd1df456227279b1c8c648983a530f2612098 -
Linux Linux 5.2 -

II. Public POCs for CVE-2026-93110

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III. Intelligence Information for CVE-2026-93110

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Patches & Fixes for CVE-2026-93110 (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-2026-90151 9.8 CRITICAL NFSv4: remove callback IDR entry on client allocation failure
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-2026-90173 9.8 CRITICAL smb: smbdirect: free completion queues with ib_free_cq()
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-2026-90413 9.1 CRITICAL IB/isert: reject login PDUs declaring more data than was received
CVE-2026-90414 9.1 CRITICAL IB/isert: reject PDUs declaring more data than was received
CVE-2026-90425 8.8 HIGH iommu/tegra241-cmdqv: Require exactly one Stream ID for a vSID
CVE-2026-93042 8.8 HIGH dmaengine: dw-edma: Terminate all descriptors without callbacks
CVE-2026-93189 8.8 HIGH HID: core: quiesce input in hid_hw_stop() to prevent use-after-free
CVE-2026-90329 8.8 HIGH HID: synchronize input before cleaning up a failed probe
CVE-2026-90357 8.8 HIGH wifi: mt76: mt7915: unlink TWT flow if the MCU rejects the agreement
CVE-2026-90256 8.8 HIGH Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90367 8.8 HIGH wifi: mt76: mt7996: hold dev->mt76.mutex while disabling tx worker in SER
CVE-2026-90381 8.8 HIGH wifi: mt76: fix handling channel context with different bands in mt76_switch_vif_chanctx()
CVE-2026-90379 8.8 HIGH wifi: mt76: mt7921: Add PCIe AER handler support to prevent system crash
CVE-2026-90380 8.8 HIGH wifi: mt76: mt792x: fix use-after-free in mt76_rx_poll_complete
CVE-2026-90371 8.8 HIGH wifi: mt76: fix RXDMAD_C buffer recycling race

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-2026-93110

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