High

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

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().

Published Sep 17, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

—

No EPSS score.

Affects

Linux

CVSS base

7.0

High · 2 source(s)

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ a93e7b331568227500186a465fee3c2cb5dffd1f and < 63eaa7663335d482a8825c231213e312cacea567≥ a93e7b331568227500186a465fee3c2cb5dffd1f and < df4faf65194ec6c315a59be4c6749eaeb3009243≥ a93e7b331568227500186a465fee3c2cb5dffd1f and < 506b43dde5f9ac0068b1360e6b5dbee07fda59fb≥ a93e7b331568227500186a465fee3c2cb5dffd1f and < 15340b00e665af805523b08515294a1aa1778151≥ a93e7b331568227500186a465fee3c2cb5dffd1f and < 234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac≥ a93e7b331568227500186a465fee3c2cb5dffd1f and < 16695e9059d80ea6661e8399064b0c01f641dd8c≥ a93e7b331568227500186a465fee3c2cb5dffd1f and < ec5bd6731183eb6f619140c9bef2ee11ed818c20≥ a93e7b331568227500186a465fee3c2cb5dffd1f and < 67b6fc084b034a91c3ec7907a3fed89a2450f30b and 3 more version 085d735c858934e5d5bfaedb1fc98bd9135e6ff1≥ 4.14.100 and < 4.15version 4.18	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

High

Privileges required

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.0	CVSS 3.1	High	1.0	5.9	416baaa9-dc9f-4396-8d5f-8c081fb06d67 via NIST National Vulnerability Database
7.0	CVSS 3.1	High	—	—	Linux via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H (score shown at the top: 416baaa9-dc9f-4396-8d5f-8c081fb06d67)

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 15, 2026
CVSS changed · 7.0
Oct 15, 2026 · NIST National Vulnerability Database
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Sep 17, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/506b43dde5f9ac0068b1360e6b5dbee07fda59fb
NIST National Vulnerability Database
git.kernel.org/stable/c/234156f6c6d9ec35dc47abbcc3adc3c79fc6a5ac
NIST National Vulnerability Database
git.kernel.org/stable/c/67b6fc084b034a91c3ec7907a3fed89a2450f30b
NIST National Vulnerability Database
git.kernel.org/stable/c/ec5bd6731183eb6f619140c9bef2ee11ed818c20
NIST National Vulnerability Database
git.kernel.org/stable/c/63eaa7663335d482a8825c231213e312cacea567
NIST National Vulnerability Database
git.kernel.org/stable/c/16695e9059d80ea6661e8399064b0c01f641dd8c
NIST National Vulnerability Database
git.kernel.org/stable/c/df4faf65194ec6c315a59be4c6749eaeb3009243
NIST National Vulnerability Database
git.kernel.org/stable/c/15340b00e665af805523b08515294a1aa1778151
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 13h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 13h
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No FIRST EPSS score.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-93054 is "uio: Fix stale info pointer in failed registration path", rated High. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.0 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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