{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63899", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.019Z", "datePublished": "2026-07-19T14:55:08.116Z", "dateUpdated": "2026-07-19T14:55:08.116Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T14:55:08.116Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/serial/mxuport.c"], "versions": [{"version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "086b858b5f5125bc9d967ea2bd825f83d9f8f29d", "status": "affected", "versionType": "git"}, {"version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "2f3661eb2446e1ef593da45e01a3b21a906768ec", "status": "affected", "versionType": "git"}, {"version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "ccbec56f2f9af008f1574335cc6a668f16603e47", "status": "affected", "versionType": "git"}, {"version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "be3a1ed4ae51fa8dde57383277d336ce834f2cd9", "status": "affected", "versionType": "git"}, {"version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "e906545641d34fb1a09a65b4b5cfdff40eb09681", "status": "affected", "versionType": "git"}, {"version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "6c0cf56f00f280d72180bb6ce79741bc787a6269", "status": "affected", "versionType": "git"}, {"version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "b40166b4ef96067620a0f248e74ad9658c8f680c", "status": "affected", "versionType": "git"}, {"version": "ee467a1f2066d2bfa293f7c2c7f1ff7000b0a39e", "lessThan": "4085f0dbb1ce2251c9a5938d693de6593f0ab2bd", "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/usb/serial/mxuport.c"], "versions": [{"version": "3.14", "status": "affected"}, {"version": "0", "lessThan": "3.14", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "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": "3.14", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.6.143"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/086b858b5f5125bc9d967ea2bd825f83d9f8f29d"}, {"url": "https://git.kernel.org/stable/c/2f3661eb2446e1ef593da45e01a3b21a906768ec"}, {"url": "https://git.kernel.org/stable/c/ccbec56f2f9af008f1574335cc6a668f16603e47"}, {"url": "https://git.kernel.org/stable/c/be3a1ed4ae51fa8dde57383277d336ce834f2cd9"}, {"url": "https://git.kernel.org/stable/c/e906545641d34fb1a09a65b4b5cfdff40eb09681"}, {"url": "https://git.kernel.org/stable/c/6c0cf56f00f280d72180bb6ce79741bc787a6269"}, {"url": "https://git.kernel.org/stable/c/b40166b4ef96067620a0f248e74ad9658c8f680c"}, {"url": "https://git.kernel.org/stable/c/4085f0dbb1ce2251c9a5938d693de6593f0ab2bd"}], "title": "USB: serial: mxuport: fix memory corruption with small endpoint", "x_generator": {"engine": "bippy-1.2.0"}}}}

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