CVE-2026-63899

{"id": "CVE-2026-63899", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "086b858b5f5125bc9d967ea2bd825f83d9f8f29d", "versionType": "git"}, {"status": "affected", "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "2f3661eb2446e1ef593da45e01a3b21a906768ec", "versionType": "git"}, {"status": "affected", "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "ccbec56f2f9af008f1574335cc6a668f16603e47", "versionType": "git"}, {"status": "affected", "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "be3a1ed4ae51fa8dde57383277d336ce834f2cd9", "versionType": "git"}, {"status": "affected", "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "e906545641d34fb1a09a65b4b5cfdff40eb09681", "versionType": "git"}, {"status": "affected", "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "6c0cf56f00f280d72180bb6ce79741bc787a6269", "versionType": "git"}, {"status": "affected", "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "b40166b4ef96067620a0f248e74ad9658c8f680c", "versionType": "git"}, {"status": "affected", "version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "4085f0dbb1ce2251c9a5938d693de6593f0ab2bd", "versionType": "git"}], "programFiles": ["drivers/usb/serial/mxuport.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.14"}, {"status": "unaffected", "version": "0", "lessThan": "3.14", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.259", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.210", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.143", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.93", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.35", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.12", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/usb/serial/mxuport.c"], "defaultStatus": "affected"}]}], "published": "2026-07-19T16:17:07.497", "references": [{"url": "https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: mxuport: fix memory corruption with small endpoint\n\nMake sure that the bulk-out endpoint max packet size is at least eight\nbytes to avoid user-controlled slab corruption should a malicious device\nreport a smaller size."}], "lastModified": "2026-10-30T14:38:26.447", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AF280FB6-C409-4BC3-ADAE-EC4DDB0F64F8", "versionEndExcluding": "5.10.259", "versionStartIncluding": "3.14"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5E938CDF-D1C4-43D0-98DC-9E11B6B55801", "versionEndExcluding": "5.15.210", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C4446623-5F2B-4DD8-8666-9FAAC285A757", "versionEndExcluding": "6.1.176", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9062F1CD-CAD6-4EA2-A73F-C06D4A887B8C", "versionEndExcluding": 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