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CVE-2026-92510— RDMA/core: Fix potential use after free in ib_destroy_srq_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，以下漏洞已得到修复： RDMA/core：修复 ib_destroy_srq_user() 中潜在的释放后使用（Use-After-Free）问题 当通过 netlink 路径访问 SRQ（共享接收队列）时，对该 SRQ 的唯一同步机制是 。目前， 在 的末尾才被调用，但这为时已晚，因为到该时点，与 SRQ 关联的厂商特定资源可能已经被释放。这会在一个小时间窗口内导致 SRQ 仍可通过 restrack 被访问，从而引发潜在的释放后使用错误。 修复方式是将 的调用移动到 的开头，确保在释放其

CVSS 7.8 · High EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1598.006

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 48f8a70e899fa4d9c8f00369f482f0382173ece9< a5bfd9fe05d5cebbd3e447bf7f7b2c663007d8b9 affected
48f8a70e899fa4d9c8f00369f482f0382173ece9< d3d0eabe6e39b024deb3e085e2d408d037e967c3 affected
48f8a70e899fa4d9c8f00369f482f0382173ece9< 9c704383529044c02122f85a2a9a42cbf14a07a6 affected
48f8a70e899fa4d9c8f00369f482f0382173ece9< bedd7dee72588c838f5b67197ea8b387e7beb918 affected
48f8a70e899fa4d9c8f00369f482f0382173ece9< 95c992c869df54a6a7061f5f3fb6400244f2af8f affected
48f8a70e899fa4d9c8f00369f482f0382173ece9< 88244ecc71cc0b3ed200f5ef7ddea6686adfd730 affected
5.13 affected
< 5.13 unaffected
… +6 more rows
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I. Basic Information for CVE-2026-92510

Vulnerability Information
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Vulnerability Title
RDMA/core: Fix potential use after free in ib_destroy_srq_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_destroy_srq_user() When accessing a SRQ via the netlink path the only synchronization mechanism for the said SRQ is rdma_restrack_get(). Currently, rdma_restrack_del() is invoked at the end of ib_destroy_srq_user(), which is too late, since by that point vendor-specific resources associated with the SRQ might already be freed. This can leave a short window where the SRQ 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_destroy_srq_user(), ensuring that the SRQ is removed from restrack before its internal resources are released. This guarantees that no new users hold references to a SRQ 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 48f8a70e899fa4d9c8f00369f482f0382173ece9 ~ a5bfd9fe05d5cebbd3e447bf7f7b2c663007d8b9 -
Linux Linux 5.13 -

II. Public POCs for CVE-2026-92510

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III. Intelligence Information for CVE-2026-92510

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Patches & Fixes for CVE-2026-92510 (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

V. Comments for CVE-2026-92510

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