CVE-2025-71091

Kernel crash via repeated team-port list deletion

Published Jan 13, 2026 · Updated Jan 13, 2026

Linux Kernel contains a team driver flaw that allows local users to crash the kernel through a crafted team-port priority update. After a queued team port is disabled and removed from qom_list, team_queue_override_port_prio_changed() wrongly deletes the same list entry again when its priority changes. Exploitation requires local low-privileged access to submit team generic-netlink options and a disabled port retaining a nonzero queue ID; the resulting list corruption triggers a kernel BUG and service interruption.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Linux Kernel contains a team driver flaw that allows local users to crash the kernel through a crafted team-port priority update. After a queued team port is disabled and removed from qom_list, team_queue_override_port_prio_changed() wrongly deletes the same list entry again when its priority changes. Exploitation requires local low-privileged access to submit team generic-netlink options and a disabled port retaining a nonzero queue ID; the resulting list corruption triggers a kernel BUG and service interruption.

The record

CVE
CVE-2025-71091
Published
Jan 13, 2026
Updated
Jan 13, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

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

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Is a vulnerable build present?

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

  1. Affected versionversion=3.11
  2. Affected versionversion=6c31ff366c1116823e77019bae3e92e9d77a49f4 <107d245f84cb4f55f597d31eda34b42a2b7d6952
  3. Affected versionversion=6c31ff366c1116823e77019bae3e92e9d77a49f4 <53a727a8bfd78c739e130a781192d0f6f8e03d39
  4. Affected versionversion=6c31ff366c1116823e77019bae3e92e9d77a49f4 <6bfb62b6010a16112dcae52f490e5e0e6abe12a3
  5. Affected versionversion=6c31ff366c1116823e77019bae3e92e9d77a49f4 <932ac51d9953eaf77a1252f79b656d4ca86163c6
  6. Affected versionversion=6c31ff366c1116823e77019bae3e92e9d77a49f4 <b71187648ef2349254673d0523fdf96d1fe3d758

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.11; version=6c31ff366c1116823e77019bae3e92e9d77a49f4 <107d245f84cb4f55f597d31eda34b42a2b7d6952; version=6c31ff366c1116823e77019bae3e92e9d77a49f4 <53a727a8bfd78c739e130a781192d0f6f8e03d39; version=6c31ff366c1116823e77019bae3e92e9d77a49f4 <6bfb62b6010a16112dcae52f490e5e0e6abe12a3; version=6c31ff366c1116823e77019bae3e92e9d77a49f4 <932ac51d9953eaf77a1252f79b656d4ca86163c6; version=6c31ff366c1116823e77019bae3e92e9d77a49f4 <b71187648ef2349254673d0523fdf96d1fe3d758

Published CVSS scores

7.0Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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

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Your stack

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