{"api_version":"1","generated_at":"2026-07-20T23:54:37+00:00","cve":"CVE-2026-63902","urls":{"html":"https://cve.report/CVE-2026-63902","api":"https://cve.report/api/cve/CVE-2026-63902.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63902","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63902"},"summary":{"title":"USB: serial: cypress_m8: validate interrupt packet headers","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: cypress_m8: validate interrupt packet headers\n\ncypress_read_int_callback() parses the interrupt-in buffer according to\nthe selected Cypress packet format. Format 1 has a two-byte status/count\nheader and format 2 has a one-byte combined status/count header. The\nusb-serial core sizes the interrupt-in buffer from the endpoint\ndescriptor's wMaxPacketSize, and successful interrupt transfers can\ncomplete short when URB_SHORT_NOT_OK is not set.\n\nCheck that the completed packet contains the selected header before\nreading it. Malformed short reports are ignored and the interrupt URB is\nresubmitted through the existing retry path, preventing out-of-bounds\nheader-byte reads.\n\nKASAN report as below:\nKASAN slab-out-of-bounds in cypress_read_int_callback+0x240/0x7f0\nRead of size 1\nCall trace:\n  cypress_read_int_callback() (drivers/usb/serial/cypress_m8.c:1009)\n  __usb_hcd_giveback_urb()\n  dummy_timer()\n\n[ johan: use constants in header length sanity checks ]","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:07","updated_at":"2026-07-19 16:17:07"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/90664556916de22467097d4c8ceb716d597a5c32","name":"https://git.kernel.org/stable/c/90664556916de22467097d4c8ceb716d597a5c32","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9f9bfc80c67f35a275820da7e83a35dface08281","name":"https://git.kernel.org/stable/c/9f9bfc80c67f35a275820da7e83a35dface08281","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ae03453f2c809ca3cf73753269fa6184dea7160f","name":"https://git.kernel.org/stable/c/ae03453f2c809ca3cf73753269fa6184dea7160f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/44f9bab8df7750a1e2a4d6cc22d7c9c2dc096aed","name":"https://git.kernel.org/stable/c/44f9bab8df7750a1e2a4d6cc22d7c9c2dc096aed","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/aaa66708bfb1dca2acd219d1c1582f9f6d5492cb","name":"https://git.kernel.org/stable/c/aaa66708bfb1dca2acd219d1c1582f9f6d5492cb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4a4cb0021ebe1fcadb52e04d19ed8d71470a530b","name":"https://git.kernel.org/stable/c/4a4cb0021ebe1fcadb52e04d19ed8d71470a530b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/be50533fe7068e86eb7adb81988e6d6a3f6dfe53","name":"https://git.kernel.org/stable/c/be50533fe7068e86eb7adb81988e6d6a3f6dfe53","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fcef31a5a85ccf3c313449a866ec6ed7e4132425","name":"https://git.kernel.org/stable/c/fcef31a5a85ccf3c313449a866ec6ed7e4132425","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63902","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63902","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb fcef31a5a85ccf3c313449a866ec6ed7e4132425 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb aaa66708bfb1dca2acd219d1c1582f9f6d5492cb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb 44f9bab8df7750a1e2a4d6cc22d7c9c2dc096aed git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb be50533fe7068e86eb7adb81988e6d6a3f6dfe53 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb 90664556916de22467097d4c8ceb716d597a5c32 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb ae03453f2c809ca3cf73753269fa6184dea7160f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb 4a4cb0021ebe1fcadb52e04d19ed8d71470a530b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3416eaa1f8f8d516b77de514e14cf8da256d28fb 9f9bfc80c67f35a275820da7e83a35dface08281 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.26","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.26 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.259 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.210 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.176 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.143 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.93 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.35 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.12 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/usb/serial/cypress_m8.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"fcef31a5a85ccf3c313449a866ec6ed7e4132425","status":"affected","version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","versionType":"git"},{"lessThan":"aaa66708bfb1dca2acd219d1c1582f9f6d5492cb","status":"affected","version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","versionType":"git"},{"lessThan":"44f9bab8df7750a1e2a4d6cc22d7c9c2dc096aed","status":"affected","version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","versionType":"git"},{"lessThan":"be50533fe7068e86eb7adb81988e6d6a3f6dfe53","status":"affected","version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","versionType":"git"},{"lessThan":"90664556916de22467097d4c8ceb716d597a5c32","status":"affected","version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","versionType":"git"},{"lessThan":"ae03453f2c809ca3cf73753269fa6184dea7160f","status":"affected","version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","versionType":"git"},{"lessThan":"4a4cb0021ebe1fcadb52e04d19ed8d71470a530b","status":"affected","version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","versionType":"git"},{"lessThan":"9f9bfc80c67f35a275820da7e83a35dface08281","status":"affected","version":"3416eaa1f8f8d516b77de514e14cf8da256d28fb","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/usb/serial/cypress_m8.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.26"},{"lessThan":"2.6.26","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.259","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.210","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.176","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.143","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.93","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.35","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.12","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.259","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.210","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.176","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.143","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.93","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.35","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.12","versionStartIncluding":"2.6.26","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1","versionStartIncluding":"2.6.26","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: cypress_m8: validate interrupt packet headers\n\ncypress_read_int_callback() parses the interrupt-in buffer according to\nthe selected Cypress packet format. Format 1 has a two-byte status/count\nheader and format 2 has a one-byte combined status/count header. The\nusb-serial core sizes the interrupt-in buffer from the endpoint\ndescriptor's wMaxPacketSize, and successful interrupt transfers can\ncomplete short when URB_SHORT_NOT_OK is not set.\n\nCheck that the completed packet contains the selected header before\nreading it. Malformed short reports are ignored and the interrupt URB is\nresubmitted through the existing retry path, preventing out-of-bounds\nheader-byte reads.\n\nKASAN report as below:\nKASAN slab-out-of-bounds in cypress_read_int_callback+0x240/0x7f0\nRead of size 1\nCall trace:\n  cypress_read_int_callback() (drivers/usb/serial/cypress_m8.c:1009)\n  __usb_hcd_giveback_urb()\n  dummy_timer()\n\n[ johan: use constants in header length sanity checks ]"}],"providerMetadata":{"dateUpdated":"2026-07-19T14:55:10.267Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/fcef31a5a85ccf3c313449a866ec6ed7e4132425"},{"url":"https://git.kernel.org/stable/c/aaa66708bfb1dca2acd219d1c1582f9f6d5492cb"},{"url":"https://git.kernel.org/stable/c/44f9bab8df7750a1e2a4d6cc22d7c9c2dc096aed"},{"url":"https://git.kernel.org/stable/c/be50533fe7068e86eb7adb81988e6d6a3f6dfe53"},{"url":"https://git.kernel.org/stable/c/90664556916de22467097d4c8ceb716d597a5c32"},{"url":"https://git.kernel.org/stable/c/ae03453f2c809ca3cf73753269fa6184dea7160f"},{"url":"https://git.kernel.org/stable/c/4a4cb0021ebe1fcadb52e04d19ed8d71470a530b"},{"url":"https://git.kernel.org/stable/c/9f9bfc80c67f35a275820da7e83a35dface08281"}],"title":"USB: serial: cypress_m8: validate interrupt packet headers","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63902","datePublished":"2026-07-19T14:55:10.267Z","dateReserved":"2026-07-19T07:54:57.019Z","dateUpdated":"2026-07-19T14:55:10.267Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:07","lastModifiedDate":"2026-07-19 16:17:07","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63902","Ordinal":"1","Title":"USB: serial: cypress_m8: validate interrupt packet headers","CVE":"CVE-2026-63902","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63902","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nUSB: serial: cypress_m8: validate interrupt packet headers\n\ncypress_read_int_callback() parses the interrupt-in buffer according to\nthe selected Cypress packet format. Format 1 has a two-byte status/count\nheader and format 2 has a one-byte combined status/count header. The\nusb-serial core sizes the interrupt-in buffer from the endpoint\ndescriptor's wMaxPacketSize, and successful interrupt transfers can\ncomplete short when URB_SHORT_NOT_OK is not set.\n\nCheck that the completed packet contains the selected header before\nreading it. Malformed short reports are ignored and the interrupt URB is\nresubmitted through the existing retry path, preventing out-of-bounds\nheader-byte reads.\n\nKASAN report as below:\nKASAN slab-out-of-bounds in cypress_read_int_callback+0x240/0x7f0\nRead of size 1\nCall trace:\n  cypress_read_int_callback() (drivers/usb/serial/cypress_m8.c:1009)\n  __usb_hcd_giveback_urb()\n  dummy_timer()\n\n[ johan: use constants in header length sanity checks ]","Type":"Description","Title":"USB: serial: cypress_m8: validate interrupt packet headers"}]}}}