CVE-2026-63862
PCI: mediatek-gen3: Prevent leaking IRQ domains when IRQ not found
Description
In the Linux kernel, the following vulnerability has been resolved: PCI: mediatek-gen3: Prevent leaking IRQ domains when IRQ not found In mtk_pcie_setup_irq(), the IRQ domains are allocated before the controller's IRQ is fetched. If the latter fails, the function directly returns an error, without cleaning up the allocated domains. Hence, reverse the order so that the IRQ domains are allocated after the controller's IRQ is found. This was flagged by Sashiko during a review of "[PATCH v6 0/7] PCI: mediatek-gen3: add power control support".
INFO
Published Date :
July 19, 2026, 3:16 p.m.
Last Modified :
July 19, 2026, 3:16 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-63862
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
- Reverse IRQ domain allocation order in mtk_pcie_setup_irq().
- Allocate IRQ domains after controller's IRQ is found.
- Clean up allocated domains if IRQ fetch fails.
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-2026-63862.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-63862 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-2026-63862
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-2026-63862 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-63862 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.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jul. 19, 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': '814cceebba9b7d1306b8d49587ffb0e81f7b73af', 'lessThan': 'abd3c1927d33766aef39c4640880e3d2637429c2', 'versionType': 'git'}, {'status': 'affected', 'version': '814cceebba9b7d1306b8d49587ffb0e81f7b73af', 'lessThan': '07a5ecb94768cbf76fe659e9924000e9ced0c8a6', 'versionType': 'git'}, {'status': 'affected', 'version': '814cceebba9b7d1306b8d49587ffb0e81f7b73af', 'lessThan': '946b31b5a699a2760ee52af0055e5ebf29c5f4cb', 'versionType': 'git'}, {'status': 'affected', 'version': '814cceebba9b7d1306b8d49587ffb0e81f7b73af', 'lessThan': '0a2d60edc3e57c9512e239ebdfd12204d3368560', 'versionType': 'git'}, {'status': 'affected', 'version': '814cceebba9b7d1306b8d49587ffb0e81f7b73af', 'lessThan': '215d4273347b9010a9deae378b0df79c163f707d', 'versionType': 'git'}, {'status': 'affected', 'version': '814cceebba9b7d1306b8d49587ffb0e81f7b73af', 'lessThan': '5573c44cb3fd01a9f62d569ae9ac870ef5f0e0ba', 'versionType': 'git'}], 'programFiles': ['drivers/pci/controller/pcie-mediatek-gen3.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.13', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.141', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.91', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.33', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.10', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/pci/controller/pcie-mediatek-gen3.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: PCI: mediatek-gen3: Prevent leaking IRQ domains when IRQ not found In mtk_pcie_setup_irq(), the IRQ domains are allocated before the controller's IRQ is fetched. If the latter fails, the function directly returns an error, without cleaning up the allocated domains. Hence, reverse the order so that the IRQ domains are allocated after the controller's IRQ is found. This was flagged by Sashiko during a review of "[PATCH v6 0/7] PCI: mediatek-gen3: add power control support". Added Reference https://git.kernel.org/stable/c/07a5ecb94768cbf76fe659e9924000e9ced0c8a6 Added Reference https://git.kernel.org/stable/c/0a2d60edc3e57c9512e239ebdfd12204d3368560 Added Reference https://git.kernel.org/stable/c/215d4273347b9010a9deae378b0df79c163f707d Added Reference https://git.kernel.org/stable/c/5573c44cb3fd01a9f62d569ae9ac870ef5f0e0ba Added Reference https://git.kernel.org/stable/c/946b31b5a699a2760ee52af0055e5ebf29c5f4cb Added Reference https://git.kernel.org/stable/c/abd3c1927d33766aef39c4640880e3d2637429c2