{"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"}}}}

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