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CVE-2026-93054— uio: Fix stale info pointer in failed registration path

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，已解决以下漏洞： uio：修复注册失败路径中过时的 info 指针 在调用 之后，UIO 设备对用户空间可见，且 可以被打开。如果后续的某个设置步骤失败， 会回滚（unwind）该设备，但 仍指向由调用方拥有的 。 当文件打开操作与失败的注册路径发生竞争时，这种情况是不安全的。已打开的文件描述符保持对 的引用，而调用方看到注册失败后可能会释放其 。随后对已打开文件的后续文件操作可能会解引用已释放的内存（通过 指向该内存）。 修复方案： 将 之后的失败处理类比于设备注销（unregister）

CVSS 7.0 · High EPSS 0.16% · P4

Possible ATT&CK Techniques 1 AI

T1202 · Indirect Command Execution

Affected Version Matrix 20

VendorProduct Version RangeStatus
Linux Linux a93e7b331568227500186a465fee3c2cb5dffd1f< 63eaa7663335d482a8825c231213e312cacea567 affected
a93e7b331568227500186a465fee3c2cb5dffd1f< df4faf65194ec6c315a59be4c6749eaeb3009243 affected
a93e7b331568227500186a465fee3c2cb5dffd1f< 506b43dde5f9ac0068b1360e6b5dbee07fda59fb affected
a93e7b331568227500186a465fee3c2cb5dffd1f< 15340b00e665af805523b08515294a1aa1778151 affected
a93e7b331568227500186a465fee3c2cb5dffd1f< 234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac affected
a93e7b331568227500186a465fee3c2cb5dffd1f< 16695e9059d80ea6661e8399064b0c01f641dd8c affected
a93e7b331568227500186a465fee3c2cb5dffd1f< ec5bd6731183eb6f619140c9bef2ee11ed818c20 affected
a93e7b331568227500186a465fee3c2cb5dffd1f< 67b6fc084b034a91c3ec7907a3fed89a2450f30b affected
… +12 more rows
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I. Basic Information for CVE-2026-93054

Vulnerability Information
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Vulnerability Title
uio: Fix stale info pointer in failed registration path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: uio: Fix stale info pointer in failed registration path After device_add(), the UIO device is visible to userspace and /dev/uioX can be opened. If a later setup step fails, __uio_register_device() unwinds the device but leaves idev->info pointing at the caller-owned struct uio_info. That is unsafe when an opener races with the failed registration path. The open file keeps a reference to the uio_device, while the caller sees registration failure and may free its struct uio_info. Later file operations can then follow idev->info and dereference freed memory. Handle post-device_add() failures like unregister: remove UIO attributes while the info pointer is still valid, then clear idev->info under info_lock and wake existing waiters/async users before removing the device and minor. This makes already-open file descriptors observe the same "device gone" state as normal uio_unregister_device().
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/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 a93e7b331568227500186a465fee3c2cb5dffd1f ~ 63eaa7663335d482a8825c231213e312cacea567 -
Linux Linux 4.18 -

II. Public POCs for CVE-2026-93054

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III. Intelligence Information for CVE-2026-93054

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Patches & Fixes for CVE-2026-93054 (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-2026-93054

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