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CVE-2026-64461— PCI: mediatek: Fix IRQ domain leak when port fails to enable

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于PCI mediatek驱动在端口启用失败时未释放IRQ域，可能导致资源泄漏。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.18% · P8

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux b099631df160ec608cd6147f4d20a8042567a5b8< e23da72ef202654a7d5269885c4fa39a8404db76 affected
b099631df160ec608cd6147f4d20a8042567a5b8< ec7c05eed47d8b15c45380aee7ca168a82e15035 affected
b099631df160ec608cd6147f4d20a8042567a5b8< 1fbe8972a39548a633d06d7b03a01b7b119a2c12 affected
b099631df160ec608cd6147f4d20a8042567a5b8< fe8c701a53c2816cd82301f66c671d952003c1b0 affected
b099631df160ec608cd6147f4d20a8042567a5b8< ce52e494a7555bdae1d990a2654fd7547ef6d986 affected
b099631df160ec608cd6147f4d20a8042567a5b8< 6e6a529d6f779413379b4404c9ef6a36c0337225 affected
b099631df160ec608cd6147f4d20a8042567a5b8< df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e affected
b099631df160ec608cd6147f4d20a8042567a5b8< f865a57896bd92d7662eb2818d8f48872e2cbbc7 affected
… +10 more rows
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I. Basic Information for CVE-2026-64461

Vulnerability Information
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Vulnerability Title
PCI: mediatek: Fix IRQ domain leak when port fails to enable
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会开源的一款操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于PCI mediatek驱动在端口启用失败时未释放IRQ域，可能导致资源泄漏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux b099631df160ec608cd6147f4d20a8042567a5b8 ~ e23da72ef202654a7d5269885c4fa39a8404db76 -
Linux Linux 4.14 -

II. Public POCs for CVE-2026-64461

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III. Intelligence Information for CVE-2026-64461

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Patches & Fixes for CVE-2026-64461 (8)

Same Patch Batch · Linux · 2026-07-25 · 274 CVEs total

CVE-2026-64355 9.8 CRITICAL bpf: Reject fragmented frames in devmap
CVE-2026-64459 9.8 CRITICAL tcp: restore RCU grace period in tcp_ao_destroy_sock
CVE-2026-64303 9.8 CRITICAL spi: fsl-lpspi: terminate the RX channel on TX prepare failure path
CVE-2026-64439 9.8 CRITICAL crypto: krb5 - filter out async aead implementations at alloc
CVE-2026-64410 9.8 CRITICAL netfilter: flowtable: IPIP tunnel hardware offload is not yet support
CVE-2026-64399 9.8 CRITICAL ksmbd: add permission checks for FSCTL_DUPLICATE_EXTENTS_TO_FILE
CVE-2026-64397 9.8 CRITICAL ksmbd: serialize QUERY_DIRECTORY requests per file
CVE-2026-64391 9.8 CRITICAL ksmbd: use opener credentials for ADS I/O
CVE-2026-64387 9.8 CRITICAL smb: client: fix query directory replay double-free
CVE-2026-64386 9.8 CRITICAL smb: client: fix query_info() replay double-free
CVE-2026-64385 9.8 CRITICAL smb: client: fix double-free in SMB2_ioctl() replay
CVE-2026-64383 9.8 CRITICAL smb: client: fix double-free in SMB2_flush() replay
CVE-2026-64384 9.8 CRITICAL smb: client: fix change notify replay double-free
CVE-2026-64268 9.8 CRITICAL RDMA/siw: bound Read Response placement to the RREAD length
CVE-2026-64523 9.8 CRITICAL net/handshake: Take a long-lived file reference at submit
CVE-2026-64269 9.1 CRITICAL RDMA/rtrs-srv: Bound RDMA-Write length to chunk size in rdma_write_sg
CVE-2026-64257 9.1 CRITICAL smb: client: reject overlapping data areas in SMB2 responses
CVE-2026-64319 9.1 CRITICAL nvmet-auth: validate reply message payload bounds against transfer length
CVE-2026-64320 9.1 CRITICAL nvmet: fix pre-auth out-of-bounds heap read in Discovery Get Log Page
CVE-2026-64393 9.1 CRITICAL ksmbd: run set info with opener credentials

Showing top 20 of 274 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-64461

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