Linux Kernel up to 7.1-rc1 fanotify fsnotify_get_mark_safe permission

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Linux Kernel up to 6.6.139/6.12.87/6.18.29/7.0.6/7.1-rc1 and classified as critical. This vulnerability affects the function fsnotify_get_mark_safe of the component fanotify. The manipulation leads to permission. This vulnerability is uniquely identified as CVE-2026-46150. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.6.139/6.12.87/6.18.29/7.0.6/7.1-rc1. It has been rated as critical. This issue affects the function fsnotify_get_mark_safe of the component fanotify. The manipulation with an unknown input leads to a permission vulnerability. Using CWE to declare the problem leads to CWE-275. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: fanotify: fix false positive on permission events fsnotify_get_mark_safe() may return false for a mark on an unrelated group, which results in bypassing the permission check. Fix by skipping over detached marks that are not in the current group.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-46150 since 05/13/2026. The exploitation is known to be easy. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/22/2026). MITRE ATT&CK project uses the attack technique T1222 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 321690 (SUSE SLES12 Security Update : kernel (SUSE-SU-2026:2450-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.6.140, 6.12.88, 6.18.30, 7.0.7 or 7.1-rc2 eliminates this vulnerability. Applying the patch 895ebbedf88318607c24acc0f591c74b165e1d0a/f130790f1acc8399f32652846c875a251efd040f/7baa02b0ae9d17ec5f08836d8ea88ce1927d0678/b7b24b28c8cd55844cab908f4f39dded638d5538/7746e3bd4cc19b5092e00d32d676e329bfcb6900 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 (321690). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 8.0
VulDB Temp Score: 7.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.1
CNA Vector (Linux): 🔒

CVSSv2info

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

Exploitinginfo

Class: Permission
CWE: CWE-275 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 321690
Nessus Name: SUSE SLES12 Security Update : kernel (SUSE-SU-2026:2450-1)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.140/6.12.88/6.18.30/7.0.7/7.1-rc2
Patch: 895ebbedf88318607c24acc0f591c74b165e1d0a/f130790f1acc8399f32652846c875a251efd040f/7baa02b0ae9d17ec5f08836d8ea88ce1927d0678/b7b24b28c8cd55844cab908f4f39dded638d5538/7746e3bd4cc19b5092e00d32d676e329bfcb6900

Timelineinfo

05/13/2026 CVE reserved
05/28/2026 +15 days Advisory disclosed
05/28/2026 +0 days VulDB entry created
06/22/2026 +25 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-46150 (🔒)
GCVE (CVE): GCVE-0-2026-46150
GCVE (VulDB): GCVE-100-366677

Entryinfo

Created: 05/28/2026 13:38
Updated: 06/22/2026 14:44
Changes: 05/28/2026 13:38 (59), 06/10/2026 10:15 (11), 06/22/2026 14:44 (2)
Complete: 🔍
Cache ID: 216::103

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