CVE-2026-64461

PCI: mediatek: Fix IRQ domain leak when port fails to enable

State: Published
Severity: Not scored
Published: Jul 25, 2026
Updated: Aug 17, 2026
Reserved: Jul 19, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	b099631df160ec608cd6147f4d20a8042567a5b8 to before e23da72ef202654a7d5269885c4fa39a8404db76Affected b099631df160ec608cd6147f4d20a8042567a5b8 to before ec7c05eed47d8b15c45380aee7ca168a82e15035Affected b099631df160ec608cd6147f4d20a8042567a5b8 to before 1fbe8972a39548a633d06d7b03a01b7b119a2c12Affected b099631df160ec608cd6147f4d20a8042567a5b8 to before fe8c701a53c2816cd82301f66c671d952003c1b0Affected b099631df160ec608cd6147f4d20a8042567a5b8 to before ce52e494a7555bdae1d990a2654fd7547ef6d986Affected b099631df160ec608cd6147f4d20a8042567a5b8 to before 6e6a529d6f779413379b4404c9ef6a36c0337225Affected b099631df160ec608cd6147f4d20a8042567a5b8 to before df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2eAffected b099631df160ec608cd6147f4d20a8042567a5b8 to before f865a57896bd92d7662eb2818d8f48872e2cbbc7Affected
LinuxLinux	4.14Affected before 4.14Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.39 through 6.18.Not affected 7.1.4 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

b099631df160ec608cd6147f4d20a8042567a5b8 to before e23da72ef202654a7d5269885c4fa39a8404db76Affected
b099631df160ec608cd6147f4d20a8042567a5b8 to before ec7c05eed47d8b15c45380aee7ca168a82e15035Affected
b099631df160ec608cd6147f4d20a8042567a5b8 to before 1fbe8972a39548a633d06d7b03a01b7b119a2c12Affected
b099631df160ec608cd6147f4d20a8042567a5b8 to before fe8c701a53c2816cd82301f66c671d952003c1b0Affected
b099631df160ec608cd6147f4d20a8042567a5b8 to before ce52e494a7555bdae1d990a2654fd7547ef6d986Affected
b099631df160ec608cd6147f4d20a8042567a5b8 to before 6e6a529d6f779413379b4404c9ef6a36c0337225Affected
b099631df160ec608cd6147f4d20a8042567a5b8 to before df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2eAffected
b099631df160ec608cd6147f4d20a8042567a5b8 to before f865a57896bd92d7662eb2818d8f48872e2cbbc7Affected

LinuxLinux

4.14Affected
before 4.14Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.39 through 6.18.*Not affected
7.1.4 through 7.1.*Not affected
7.2 and laterNot affected

References

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