Linux Kernel up to 7.1.3 Mediatek mtk_pcie_irq_teardown_port memory leak

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6.2	$0-$5k	4.65-

Summaryinfo

A vulnerability, which was classified as critical, was found in Linux Kernel up to 7.1.3. This issue affects the function mtk_pcie_irq_teardown_port of the component Mediatek. Executing a manipulation can lead to memory leak. This vulnerability is handled as CVE-2026-64461. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical was found in Linux Kernel up to 7.1.3. This vulnerability affects the function mtk_pcie_irq_teardown_port of the component Mediatek. The manipulation with an unknown input leads to a memory leak vulnerability. The CWE definition for the vulnerability is CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. As an impact it is known to affect availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: PCI: mediatek: Fix IRQ domain leak when port fails to enable When mtk_pcie_enable_port() fails, mtk_pcie_port_free() removes the port from pcie->ports and frees the port structure. However, the IRQ domains set up earlier by mtk_pcie_init_irq_domain() are never freed. Fix this by refactoring mtk_pcie_irq_teardown() into a per-port helper, mtk_pcie_irq_teardown_port(), and calling it from mtk_pcie_setup() when mtk_pcie_enable_port() fails. Since the IRQ teardown must only happen in the probe error path (during resume, child devices may have active MSI mappings and the NOIRQ context prohibits sleeping locks), mtk_pcie_enable_port() is changed to return an error code so callers can distinguish the two paths and act accordingly. This issue was reported by Sashiko while reviewing the EcoNet EN7528 SoC support series.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-64461 since 07/19/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/25/2026). This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, 6.18.39, 7.1.4 or 7.2-rc1 eliminates this vulnerability. Applying the patch e23da72ef202654a7d5269885c4fa39a8404db76/ec7c05eed47d8b15c45380aee7ca168a82e15035/1fbe8972a39548a633d06d7b03a01b7b119a2c12/fe8c701a53c2816cd82301f66c671d952003c1b0/ce52e494a7555bdae1d990a2654fd7547ef6d986/6e6a529d6f779413379b4404c9ef6a36c0337225/df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e/f865a57896bd92d7662eb2818d8f48872e2cbbc7 is able to eliminate this problem.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.10.260
• 5.15.211
• 6.1.177
• 6.6.144
• 6.12.0
• 6.12.1
• 6.12.2
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• 6.12.94
• 6.12.95
• 6.12.96
• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
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• 6.18.33
• 6.18.34
• 6.18.35
• 6.18.36
• 6.18.37
• 6.18.38
• 7.1.0
• 7.1.1
• 7.1.2
• 7.1.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

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

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

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

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.261/5.15.212/6.1.178/6.6.145/6.12.97/6.18.39/7.1.4/7.2-rc1
Patch: e23da72ef202654a7d5269885c4fa39a8404db76/ec7c05eed47d8b15c45380aee7ca168a82e15035/1fbe8972a39548a633d06d7b03a01b7b119a2c12/fe8c701a53c2816cd82301f66c671d952003c1b0/ce52e494a7555bdae1d990a2654fd7547ef6d986/6e6a529d6f779413379b4404c9ef6a36c0337225/df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e/f865a57896bd92d7662eb2818d8f48872e2cbbc7

Timelineinfo

07/19/2026 CVE reserved
07/25/2026 +6 days Advisory disclosed
07/25/2026 +0 days VulDB entry created
07/25/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-64461 (🔒)
GCVE (CVE): GCVE-0-2026-64461
GCVE (VulDB): GCVE-100-383266

Entryinfo

Created: 07/25/2026 19:03
Changes: 07/25/2026 19:03 (59)
Complete: 🔍
Cache ID: 216::103

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Discussion

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