CVE-2026-63862

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63862", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.017Z", "datePublished": "2026-07-19T14:04:49.380Z", "dateUpdated": "2026-07-19T14:04:49.380Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T14:04:49.380Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: mediatek-gen3: Prevent leaking IRQ domains when IRQ not found\n\nIn mtk_pcie_setup_irq(), the IRQ domains are allocated before the\ncontroller's IRQ is fetched. If the latter fails, the function\ndirectly returns an error, without cleaning up the allocated domains.\n\nHence, reverse the order so that the IRQ domains are allocated after the\ncontroller's IRQ is found.\n\nThis was flagged by Sashiko during a review of \"[PATCH v6 0/7] PCI:\nmediatek-gen3: add power control support\"."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pci/controller/pcie-mediatek-gen3.c"], "versions": [{"version": "814cceebba9b7d1306b8d49587ffb0e81f7b73af", "lessThan": "abd3c1927d33766aef39c4640880e3d2637429c2", "status": "affected", "versionType": "git"}, {"version": "814cceebba9b7d1306b8d49587ffb0e81f7b73af", "lessThan": "07a5ecb94768cbf76fe659e9924000e9ced0c8a6", "status": "affected", "versionType": "git"}, {"version": "814cceebba9b7d1306b8d49587ffb0e81f7b73af", "lessThan": "946b31b5a699a2760ee52af0055e5ebf29c5f4cb", "status": "affected", "versionType": "git"}, {"version": "814cceebba9b7d1306b8d49587ffb0e81f7b73af", "lessThan": "0a2d60edc3e57c9512e239ebdfd12204d3368560", "status": "affected", "versionType": "git"}, {"version": "814cceebba9b7d1306b8d49587ffb0e81f7b73af", "lessThan": "215d4273347b9010a9deae378b0df79c163f707d", "status": "affected", "versionType": "git"}, {"version": "814cceebba9b7d1306b8d49587ffb0e81f7b73af", "lessThan": "5573c44cb3fd01a9f62d569ae9ac870ef5f0e0ba", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pci/controller/pcie-mediatek-gen3.c"], "versions": [{"version": "5.13", "status": "affected"}, {"version": "0", "lessThan": "5.13", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.6.141"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.12.91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "6.18.33"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.13", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/abd3c1927d33766aef39c4640880e3d2637429c2"}, {"url": "https://git.kernel.org/stable/c/07a5ecb94768cbf76fe659e9924000e9ced0c8a6"}, {"url": "https://git.kernel.org/stable/c/946b31b5a699a2760ee52af0055e5ebf29c5f4cb"}, {"url": "https://git.kernel.org/stable/c/0a2d60edc3e57c9512e239ebdfd12204d3368560"}, {"url": "https://git.kernel.org/stable/c/215d4273347b9010a9deae378b0df79c163f707d"}, {"url": "https://git.kernel.org/stable/c/5573c44cb3fd01a9f62d569ae9ac870ef5f0e0ba"}], "title": "PCI: mediatek-gen3: Prevent leaking IRQ domains when IRQ not found", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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If the latter fails, the function\ndirectly returns an error, without cleaning up the allocated domains.\n\nHence, reverse the order so that the IRQ domains are allocated after the\ncontroller's IRQ is found.\n\nThis was flagged by Sashiko during a review of \"[PATCH v6 0/7] PCI:\nmediatek-gen3: add power control support\"."}], "id": "CVE-2026-63862", "lastModified": "2026-10-26T17:06:01.920", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-07-19T15:16:53.097", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/07a5ecb94768cbf76fe659e9924000e9ced0c8a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0a2d60edc3e57c9512e239ebdfd12204d3368560"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/215d4273347b9010a9deae378b0df79c163f707d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5573c44cb3fd01a9f62d569ae9ac870ef5f0e0ba"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/946b31b5a699a2760ee52af0055e5ebf29c5f4cb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/abd3c1927d33766aef39c4640880e3d2637429c2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: PCI: mediatek-gen3: Prevent leaking IRQ domains when IRQ not found", "id": "2502276", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502276"}, "csaw": false, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nPCI: mediatek-gen3: Prevent leaking IRQ domains when IRQ not found\nIn mtk_pcie_setup_irq(), the IRQ domains are allocated before the\ncontroller's IRQ is fetched. If the latter fails, the function\ndirectly returns an error, without cleaning up the allocated domains.\nHence, reverse the order so that the IRQ domains are allocated after the\ncontroller's IRQ is found.\nThis was flagged by Sashiko during a review of \"[PATCH v6 0/7] PCI:\nmediatek-gen3: add power control support\".", "A flaw was found in the Linux kernel's MediaTek PCIe (Peripheral Component Interconnect Express) generation 3 driver. This vulnerability occurs because interrupt request (IRQ) domains are allocated before verifying the controller's IRQ. If the IRQ fetch fails, the allocated domains are not properly released, leading to a resource leak. An attacker could potentially exploit this to cause resource exhaustion, which may result in system instability or a denial of service."], "name": "CVE-2026-63862", "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63862\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63862\nhttps://lore.kernel.org/linux-cve-announce/2026071934-CVE-2026-63862-533e@gregkh/T"]}

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