CVE-2025-71100

Invalid kernel read via unchecked Wi-Fi TID

Published Jan 13, 2026 · Updated Jan 13, 2026

Out-of-bounds access in affected Linux Kernel releases starting at 6.9 allows physically proximate attackers to trigger an invalid kernel read via Wi-Fi. The rtl92cu_tx_fill_desc() function uses the TID returned by ieee80211_get_tid() to read sta_entry->tids[] without first checking the nine-entry array bound. The path requires the rtl8192cu driver and a transmitted frame with TID 9 or higher; Ubuntu reports that userspace cannot directly or reliably influence that kernel-generated value.

CVSS severity7.6
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Out-of-bounds access in affected Linux Kernel releases starting at 6.9 allows physically proximate attackers to trigger an invalid kernel read via Wi-Fi. The rtl92cu_tx_fill_desc() function uses the TID returned by ieee80211_get_tid() to read sta_entry->tids[] without first checking the nine-entry array bound. The path requires the rtl8192cu driver and a transmitted frame with TID 9 or higher; Ubuntu reports that userspace cannot directly or reliably influence that kernel-generated value.

The record

CVE
CVE-2025-71100
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-129
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.9
  2. Affected versionversion=8ca4cdef93297c9b9bf08da39bc940bd20acbb94 <90a15ff324645aa806d81fa349497cd964861b66
  3. Affected versionversion=8ca4cdef93297c9b9bf08da39bc940bd20acbb94 <9765d6eb8298b07d499cdf9ef7c237d3540102d6
  4. Affected versionversion=8ca4cdef93297c9b9bf08da39bc940bd20acbb94 <dd39edb445f07400e748da967a07d5dca5c5f96e

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.9; version=8ca4cdef93297c9b9bf08da39bc940bd20acbb94 <90a15ff324645aa806d81fa349497cd964861b66; version=8ca4cdef93297c9b9bf08da39bc940bd20acbb94 <9765d6eb8298b07d499cdf9ef7c237d3540102d6; version=8ca4cdef93297c9b9bf08da39bc940bd20acbb94 <dd39edb445f07400e748da967a07d5dca5c5f96e

Published CVSS scores

7.6kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
7.8Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.9SUSECVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N
6.5SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo