CVE-2026-93054
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Received - Intake
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Vulnerability report for CVE-2026-93054, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-09-17
Last updated on: 2026-09-18
Assigner: kernel.org
Description
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().
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Linux | Linux | a93e7b331568227500186a465fee3c2cb5dffd1f |
| Linux | Linux | a93e7b331568227500186a465fee3c2cb5dffd1f |
| Linux | Linux | a93e7b331568227500186a465fee3c2cb5dffd1f |
| Linux | Linux | a93e7b331568227500186a465fee3c2cb5dffd1f |
| Linux | Linux | a93e7b331568227500186a465fee3c2cb5dffd1f |
| Linux | Linux | a93e7b331568227500186a465fee3c2cb5dffd1f |
| Linux | Linux | a93e7b331568227500186a465fee3c2cb5dffd1f |
| Linux | Linux | a93e7b331568227500186a465fee3c2cb5dffd1f |
| Linux | Linux | 085d735c858934e5d5bfaedb1fc98bd9135e6ff1 |
| Linux | Linux | 4.14.100 |
| Linux | Linux | 4.18 |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
