CVE-2026-64461
PCI: mediatek: Fix IRQ domain leak when port fails to enable
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.
INFO
Published Date :
July 25, 2026, 10:17 a.m.
Last Modified :
July 25, 2026, 10:17 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-64461
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the Linux kernel to the latest patched version.
- Apply the specific PCI: mediatek patch.
- Rebuild and deploy the kernel.
- Verify IRQ domain management.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-64461.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64461 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-64461
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-64461 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64461 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 25, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'b099631df160ec608cd6147f4d20a8042567a5b8', 'lessThan': 'e23da72ef202654a7d5269885c4fa39a8404db76', 'versionType': 'git'}, {'status': 'affected', 'version': 'b099631df160ec608cd6147f4d20a8042567a5b8', 'lessThan': 'ec7c05eed47d8b15c45380aee7ca168a82e15035', 'versionType': 'git'}, {'status': 'affected', 'version': 'b099631df160ec608cd6147f4d20a8042567a5b8', 'lessThan': '1fbe8972a39548a633d06d7b03a01b7b119a2c12', 'versionType': 'git'}, {'status': 'affected', 'version': 'b099631df160ec608cd6147f4d20a8042567a5b8', 'lessThan': 'fe8c701a53c2816cd82301f66c671d952003c1b0', 'versionType': 'git'}, {'status': 'affected', 'version': 'b099631df160ec608cd6147f4d20a8042567a5b8', 'lessThan': 'ce52e494a7555bdae1d990a2654fd7547ef6d986', 'versionType': 'git'}, {'status': 'affected', 'version': 'b099631df160ec608cd6147f4d20a8042567a5b8', 'lessThan': '6e6a529d6f779413379b4404c9ef6a36c0337225', 'versionType': 'git'}, {'status': 'affected', 'version': 'b099631df160ec608cd6147f4d20a8042567a5b8', 'lessThan': 'df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e', 'versionType': 'git'}, {'status': 'affected', 'version': 'b099631df160ec608cd6147f4d20a8042567a5b8', 'lessThan': 'f865a57896bd92d7662eb2818d8f48872e2cbbc7', 'versionType': 'git'}], 'programFiles': ['drivers/pci/controller/pcie-mediatek.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.14'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.14', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/pci/controller/pcie-mediatek.c'], 'defaultStatus': 'affected'}] Added 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. Added Reference https://git.kernel.org/stable/c/1fbe8972a39548a633d06d7b03a01b7b119a2c12 Added Reference https://git.kernel.org/stable/c/6e6a529d6f779413379b4404c9ef6a36c0337225 Added Reference https://git.kernel.org/stable/c/ce52e494a7555bdae1d990a2654fd7547ef6d986 Added Reference https://git.kernel.org/stable/c/df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e Added Reference https://git.kernel.org/stable/c/e23da72ef202654a7d5269885c4fa39a8404db76 Added Reference https://git.kernel.org/stable/c/ec7c05eed47d8b15c45380aee7ca168a82e15035 Added Reference https://git.kernel.org/stable/c/f865a57896bd92d7662eb2818d8f48872e2cbbc7 Added Reference https://git.kernel.org/stable/c/fe8c701a53c2816cd82301f66c671d952003c1b0