{"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"}}}}