{"id":"CVE-2026-64461","state":"PUBLISHED","title":"PCI: mediatek: Fix IRQ domain leak when port fails to enable","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: mediatek: Fix IRQ domain leak when port fails to enable\n\nWhen mtk_pcie_enable_port() fails, mtk_pcie_port_free() removes the port\nfrom pcie->ports and frees the port structure. However, the IRQ domains set\nup earlier by mtk_pcie_init_irq_domain() are never freed.\n\nFix this by refactoring mtk_pcie_irq_teardown() into a per-port helper,\nmtk_pcie_irq_teardown_port(), and calling it from mtk_pcie_setup() when\nmtk_pcie_enable_port() fails. Since the IRQ teardown must only happen in\nthe probe error path (during resume, child devices may have active MSI\nmappings and the NOIRQ context prohibits sleeping locks),\nmtk_pcie_enable_port() is changed to return an error code so callers can\ndistinguish the two paths and act accordingly.\n\nThis issue was reported by Sashiko while reviewing the EcoNet EN7528 SoC\nsupport series.","publishedAt":"2026-07-25T08:51:28.309Z","updatedAt":"2026-08-17T04:56:06.127Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"e23da72ef202654a7d5269885c4fa39a8404db76","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"ec7c05eed47d8b15c45380aee7ca168a82e15035","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"1fbe8972a39548a633d06d7b03a01b7b119a2c12","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"fe8c701a53c2816cd82301f66c671d952003c1b0","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"ce52e494a7555bdae1d990a2654fd7547ef6d986","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"6e6a529d6f779413379b4404c9ef6a36c0337225","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"f865a57896bd92d7662eb2818d8f48872e2cbbc7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/controller/pcie-mediatek.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.14","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/controller/pcie-mediatek.c"]}],"references":["https://git.kernel.org/stable/c/e23da72ef202654a7d5269885c4fa39a8404db76","https://git.kernel.org/stable/c/ec7c05eed47d8b15c45380aee7ca168a82e15035","https://git.kernel.org/stable/c/1fbe8972a39548a633d06d7b03a01b7b119a2c12","https://git.kernel.org/stable/c/fe8c701a53c2816cd82301f66c671d952003c1b0","https://git.kernel.org/stable/c/ce52e494a7555bdae1d990a2654fd7547ef6d986","https://git.kernel.org/stable/c/6e6a529d6f779413379b4404c9ef6a36c0337225","https://git.kernel.org/stable/c/df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e","https://git.kernel.org/stable/c/f865a57896bd92d7662eb2818d8f48872e2cbbc7"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64461.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64461","state":"PUBLISHED","datePublished":"2026-07-25T08:51:28.309Z","dateUpdated":"2026-08-17T04:56:06.127Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.789Z"},"containers":{"cna":{"title":"PCI: mediatek: Fix IRQ domain leak when port fails to enable","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: mediatek: Fix IRQ domain leak when port fails to enable\n\nWhen mtk_pcie_enable_port() fails, mtk_pcie_port_free() removes the port\nfrom pcie->ports and frees the port structure. However, the IRQ domains set\nup earlier by mtk_pcie_init_irq_domain() are never freed.\n\nFix this by refactoring mtk_pcie_irq_teardown() into a per-port helper,\nmtk_pcie_irq_teardown_port(), and calling it from mtk_pcie_setup() when\nmtk_pcie_enable_port() fails. Since the IRQ teardown must only happen in\nthe probe error path (during resume, child devices may have active MSI\nmappings and the NOIRQ context prohibits sleeping locks),\nmtk_pcie_enable_port() is changed to return an error code so callers can\ndistinguish the two paths and act accordingly.\n\nThis issue was reported by Sashiko while reviewing the EcoNet EN7528 SoC\nsupport series."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"e23da72ef202654a7d5269885c4fa39a8404db76","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"ec7c05eed47d8b15c45380aee7ca168a82e15035","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"1fbe8972a39548a633d06d7b03a01b7b119a2c12","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"fe8c701a53c2816cd82301f66c671d952003c1b0","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"ce52e494a7555bdae1d990a2654fd7547ef6d986","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"6e6a529d6f779413379b4404c9ef6a36c0337225","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e","versionType":"git"},{"version":"b099631df160ec608cd6147f4d20a8042567a5b8","status":"affected","lessThan":"f865a57896bd92d7662eb2818d8f48872e2cbbc7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/controller/pcie-mediatek.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.14","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.39","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.4","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/pci/controller/pcie-mediatek.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e23da72ef202654a7d5269885c4fa39a8404db76"},{"url":"https://git.kernel.org/stable/c/ec7c05eed47d8b15c45380aee7ca168a82e15035"},{"url":"https://git.kernel.org/stable/c/1fbe8972a39548a633d06d7b03a01b7b119a2c12"},{"url":"https://git.kernel.org/stable/c/fe8c701a53c2816cd82301f66c671d952003c1b0"},{"url":"https://git.kernel.org/stable/c/ce52e494a7555bdae1d990a2654fd7547ef6d986"},{"url":"https://git.kernel.org/stable/c/6e6a529d6f779413379b4404c9ef6a36c0337225"},{"url":"https://git.kernel.org/stable/c/df77314b3bedbd9ad5d6f0682f98b99e3c5f7e2e"},{"url":"https://git.kernel.org/stable/c/f865a57896bd92d7662eb2818d8f48872e2cbbc7"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:56:06.127Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.18.39"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"7.1.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}