Linux Distros Unpatched Vulnerability : CVE-2026-93804

critical Nessus Plugin ID 349801

Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- wifi: mac80211: ibss: wait for in-flight TX on disconnect While leaving an IBSS in ieee80211_ibss_disconnect() mac80211 flushes stations, turns the carrier off and immediately tells the driver to leave as well. While there may be synchronize_net() in station flush and in this code later, packets can still be transmitted due to cross-CPU race conditions after carrier off is set. Therefore, it's possible for a race to happen where a TX to the driver occurs while or after telling it to leave the IBSS. This can be confusing to drivers, and in the case of iwlwifi leads to an attempt to use invalid queues. Move netif_carrier_off() to occur before sta_info_flush() during IBSS disconnect, and add synchronize_net() if flushing didn't, so that the synchronize_net() always happens between turning the carrier off and telling the driver, avoiding this race. (CVE-2026-93804)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: Critical

ID: 349801

File Name: unpatched_CVE_2026_93804.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 9/24/2026

Updated: 9/24/2026

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.29

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2026-93804

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:U/RC:C

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:linux

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 9/24/2026

Reference Information

CVE: CVE-2026-93804

Detections

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