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CVE-2026-92507— RDMA/core: Fix potential use after free in ib_dealloc_pd_user()

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/core：修复 中潜在的 use-after-free（使用已释放内存） 问题描述： 通过 netlink 路径访问保护域（PD）时，针对该 PD 唯一的同步机制是 。目前， 在 的末尾被调用，但这为时已晚，因为到那时，与 PD 关联的厂商特定资源可能已经被释放。这会留下一个短暂的时间窗口，在此期间 PD 仍可通过 restrack 访问，从而导致潜在的“使用已释放内存”（use-after-free）问题。 修复方案： 将 的调用移至 的开头，确保在释放其内部资

CVSS 7.8 · High EPSS 0.17% · P6

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 91a7c58fce065506fd98954d27694e5d83c96638< df0e9efe61ca706a07b1c9bf93fcb9032455efc4 affected
91a7c58fce065506fd98954d27694e5d83c96638< 7647363fa02046da681acc3c827d9f301c06e0e7 affected
91a7c58fce065506fd98954d27694e5d83c96638< d9c0daf9362aad2aeed1d9c5536d108772a8d31c affected
91a7c58fce065506fd98954d27694e5d83c96638< 66d65f36d39759e9f62dc746dc71d862f20f827f affected
91a7c58fce065506fd98954d27694e5d83c96638< c06f2856a1d7e75a5ff247fc05224aa2452e7265 affected
91a7c58fce065506fd98954d27694e5d83c96638< 8b90e701342275f414e36e7421c502237df241ad affected
5.10 affected
< 5.10 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-92507

Vulnerability Information
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Vulnerability Title
RDMA/core: Fix potential use after free in ib_dealloc_pd_user()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix potential use after free in ib_dealloc_pd_user() When accessing a PD via the netlink path the only synchronization mechanism for the said PD is rdma_restrack_get(). Currently, rdma_restrack_del() is invoked at the end of ib_dealloc_pd_user(), which is too late, since by that point vendor-specific resources associated with the PD might already be freed. This can leave a short window where the PD remains accessible through restrack, leading to a potential use-after-free. Fix this by moving the rdma_restrack_begin_del() call to the start of ib_dealloc_pd_user(), ensuring that the PD is removed from restrack before its internal resources are released. This guarantees that no new users hold references to a PD that is in the process of destruction. In addition, this change preserves the intended inverted order between create and destroy routines: resources are added to restrack at the end of successful creation, and hence shall be removed from the restrack first thing during the destruction flow, which keeps the lifecycle management consistent and predictable.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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 91a7c58fce065506fd98954d27694e5d83c96638 ~ df0e9efe61ca706a07b1c9bf93fcb9032455efc4 -
Linux Linux 5.10 -

II. Public POCs for CVE-2026-92507

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III. Intelligence Information for CVE-2026-92507

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Patches & Fixes for CVE-2026-92507 (6)

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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