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.
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/1fbe8972a39548a633d06d7b03a01b7b119a2c12 Patch
- git.kernel.org/stable/c/6e6a529d6f779413379b4404c9ef6a36c0337225 Patch
- git.kernel.org/stable/c/ce52e494a7555bdae1d990a2654fd7547ef6d986 Patch
- git.kernel.org/stable/c/df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e Patch
- git.kernel.org/stable/c/e23da72ef202654a7d5269885c4fa39a8404db76 Patch
- git.kernel.org/stable/c/ec7c05eed47d8b15c45380aee7ca168a82e15035 Patch
- git.kernel.org/stable/c/f865a57896bd92d7662eb2818d8f48872e2cbbc7 Patch
- git.kernel.org/stable/c/fe8c701a53c2816cd82301f66c671d952003c1b0 Patch
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 13 November 2026
- CWE
- CWE-401
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.