Linux Kernel up to 6.6.129/6.12.76/6.18.16/6.19.6/7.0-rc2 Urb Message privilege escalation

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k1.19

Summaryinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.6.129/6.12.76/6.18.16/6.19.6/7.0-rc2. Affected by this issue is some unknown functionality of the component Urb Message Handler. Performing a manipulation results in an unknown weakness. This vulnerability is cataloged as CVE-2026-23334. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Linux Kernel up to 6.6.129/6.12.76/6.18.16/6.19.6/7.0-rc2. This affects some unknown processing of the component Urb Message Handler. The impact remains unknown. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: can: usb: f81604: handle short interrupt urb messages properly If an interrupt urb is received that is not the correct length, properly detect it and don't attempt to treat the data as valid.

It is possible to read the advisory at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-23334 since 01/13/2026. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/30/2026).

The vulnerability scanner Nessus provides a plugin with the ID 303719 (Linux Distros Unpatched Vulnerability : CVE-2026-23334), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.130, 6.12.77, 6.18.17, 6.19.7 or 7.0-rc3 eliminates this vulnerability. Applying the patch 9b740ff5bc649575a5e14ca8ee54e3dd5010aaf0/c5d69da6c919648838734097861e979677eedcde/36ead57443146e6b730ce1f48ca3e9b17e19a3d2/66615e6293388f75a56226d1216fd9cfb3d95e05/7299b1b39a255f6092ce4ec0b65f66e9d6a357af is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (303719). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Privilege escalation
CWE: Unknown
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 303719
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23334

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.130/6.12.77/6.18.17/6.19.7/7.0-rc3
Patch: 9b740ff5bc649575a5e14ca8ee54e3dd5010aaf0/c5d69da6c919648838734097861e979677eedcde/36ead57443146e6b730ce1f48ca3e9b17e19a3d2/66615e6293388f75a56226d1216fd9cfb3d95e05/7299b1b39a255f6092ce4ec0b65f66e9d6a357af

Timelineinfo

01/13/2026 CVE reserved
03/25/2026 +71 days Advisory disclosed
03/25/2026 +0 days VulDB entry created
03/30/2026 +5 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23334 (🔒)
GCVE (CVE): GCVE-0-2026-23334
GCVE (VulDB): GCVE-100-353079

Entryinfo

Created: 03/25/2026 13:25
Updated: 03/30/2026 06:54
Changes: 03/25/2026 13:25 (57), 03/26/2026 07:59 (2), 03/30/2026 06:54 (1)
Complete: 🔍
Cache ID: 216:5D0:103

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