Linux Kernel up to 7.1.7/7.2-rc5 mpi3mr mpi3mr_fault_uevent_emit deadlock

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.2$0-$5k1.51-

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.1.7/7.2-rc5 and classified as critical. This issue affects the function mpi3mr_fault_uevent_emit of the component mpi3mr. Executing a manipulation can lead to deadlock. This vulnerability is handled as CVE-2026-74526. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 7.1.7/7.2-rc5 and classified as critical. This vulnerability affects the function mpi3mr_fault_uevent_emit of the component mpi3mr. The manipulation with an unknown input leads to a deadlock vulnerability. The CWE definition for the vulnerability is CWE-833. The product contains multiple threads or executable segments that are waiting for each other to release a necessary lock, resulting in deadlock. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: scsi: mpi3mr: Fix potential deadlock in mpi3mr_fault_uevent_emit mpi3mr_fault_uevent_emit() runs from the fault watchdog and reset paths where host I/O may already be blocked. GFP_KERNEL allocations here, both the local kzalloc_obj() and the ones inside kobject_uevent_env() itself, can trigger reclaim that waits on that blocked I/O and deadlock. Use memalloc_noio_save()/restore() to cover the whole call instead of just the local allocation.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-74526 since 08/15/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 335876 (Linux Distros Unpatched Vulnerability : CVE-2026-74526), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 7.1.8 or 7.2-rc6 eliminates this vulnerability. Applying the patch df817b19dac7034416d18f14347010b3e9f5cf3d/ccff8c92571500fcfed21281e33daaf645bf692f is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at Tenable (335876). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

Exploitinginfo

Class: Deadlock
CWE: CWE-833 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

Nessus ID: 335876
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-74526

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 7.1.8/7.2-rc6
Patch: df817b19dac7034416d18f14347010b3e9f5cf3d/ccff8c92571500fcfed21281e33daaf645bf692f

Timelineinfo

08/15/2026 Advisory disclosed
08/15/2026 +0 days CVE reserved
08/15/2026 +0 days VulDB entry created
08/16/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-74526 (🔒)
GCVE (CVE): GCVE-0-2026-74526
GCVE (VulDB): GCVE-100-390856

Entryinfo

Created: 08/15/2026 15:43
Updated: 08/16/2026 04:24
Changes: 08/15/2026 15:43 (59), 08/16/2026 04:24 (2)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Are you interested in using VulDB?

Download the whitepaper to learn more about our service!