{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63956","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-07-19T07:54:57.023Z","datePublished":"2026-07-19T14:55:47.597Z","dateUpdated":"2026-07-19T14:55:47.597Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-07-19T14:55:47.597Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: cypress_m8: fix memory corruption with small endpoint\n\nMake sure that the interrupt-out endpoint max packet size is at least\neight bytes to avoid user-controlled slab corruption or NULL-pointer\ndereference should a malicious device report 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/cypress_m8.c"],"versions":[{"version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","lessThan":"4fcb22218f0a7229b7ce3b3952fb644def293fa5","status":"affected","versionType":"git"},{"version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","lessThan":"ad3d1628a46134276546d7a12fedf04be9979158","status":"affected","versionType":"git"},{"version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","lessThan":"52e18ae0c47c5c89e18fcd8022f287f7cc8802ec","status":"affected","versionType":"git"},{"version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","lessThan":"4bcaa59f403dbde6328604a500d65ee8d40975d9","status":"affected","versionType":"git"},{"version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","lessThan":"1ef25704bd3b625fd151c09feee459479f71ee64","status":"affected","versionType":"git"},{"version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","lessThan":"284105c40fc31fff90cdab8a0377aaeb92f87f0e","status":"affected","versionType":"git"},{"version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","lessThan":"6c13f3bb652bc8665e709ba07122612586aea648","status":"affected","versionType":"git"},{"version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","lessThan":"e1a9d791fd66ab2431b9e6f6f835823809869047","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/cypress_m8.c"],"versions":[{"version":"2.6.26","status":"affected"},{"version":"0","lessThan":"2.6.26","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":"2.6.26","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.6.143"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.12.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"6.18.35"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"7.0.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.26","versionEndExcluding":"7.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/4fcb22218f0a7229b7ce3b3952fb644def293fa5"},{"url":"https://git.kernel.org/stable/c/ad3d1628a46134276546d7a12fedf04be9979158"},{"url":"https://git.kernel.org/stable/c/52e18ae0c47c5c89e18fcd8022f287f7cc8802ec"},{"url":"https://git.kernel.org/stable/c/4bcaa59f403dbde6328604a500d65ee8d40975d9"},{"url":"https://git.kernel.org/stable/c/1ef25704bd3b625fd151c09feee459479f71ee64"},{"url":"https://git.kernel.org/stable/c/284105c40fc31fff90cdab8a0377aaeb92f87f0e"},{"url":"https://git.kernel.org/stable/c/6c13f3bb652bc8665e709ba07122612586aea648"},{"url":"https://git.kernel.org/stable/c/e1a9d791fd66ab2431b9e6f6f835823809869047"}],"title":"USB: serial: cypress_m8: fix memory corruption with small endpoint","x_generator":{"engine":"bippy-1.2.0"}}}}