{"id":"CVE-2026-68369","state":"PUBLISHED","title":"usb: gadget: printer: fix infinite loop in printer_read()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: printer: fix infinite loop in printer_read()\n\nprinter_read() uses the same variable for the requested copy size and\nthe number of bytes actually copied to user space. copy_to_user()\nreturns the number of bytes not copied, so when it fails to copy\nanything, the computed copied length becomes zero.\n\nIn that case len, buf, current_rx_bytes and current_rx_buf are left\nunchanged. If RX data is available and the user buffer remains\nunwritable, the read loop can repeat indefinitely.\n\nTrack the copied length separately and return -EFAULT, or the number of\nbytes already copied, if an iteration makes no progress.","publishedAt":"2026-08-10T12:03:46.845Z","updatedAt":"2026-08-19T16:34:28.812Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"3f81197364b57e5318620c75f3bd63f405f60552","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"e225e2998e5a9b83c838dbbe4511fb0d63f88daf","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"3081b0e187065c3b9577e393ad664b12854aeaf3","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"994afccfdcceb73be33f69a8a8ea71e260c9eca5","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"e03597ad9494b500344076589aeaa6c6d2d381d3","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"4cde0b38cc0cb8b7dc17295801015148de37d1d2","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"c2e819be6a5c7f34344926b4bd7e3dfca58cf48a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_printer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.1","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_printer.c"]}],"references":["https://git.kernel.org/stable/c/3f81197364b57e5318620c75f3bd63f405f60552","https://git.kernel.org/stable/c/e225e2998e5a9b83c838dbbe4511fb0d63f88daf","https://git.kernel.org/stable/c/3081b0e187065c3b9577e393ad664b12854aeaf3","https://git.kernel.org/stable/c/994afccfdcceb73be33f69a8a8ea71e260c9eca5","https://git.kernel.org/stable/c/e03597ad9494b500344076589aeaa6c6d2d381d3","https://git.kernel.org/stable/c/4cde0b38cc0cb8b7dc17295801015148de37d1d2","https://git.kernel.org/stable/c/e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e","https://git.kernel.org/stable/c/c2e819be6a5c7f34344926b4bd7e3dfca58cf48a"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/68xxx/CVE-2026-68369.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-68369","state":"PUBLISHED","datePublished":"2026-08-10T12:03:46.845Z","dateUpdated":"2026-08-19T16:34:28.812Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-30T09:28:09.386Z"},"containers":{"cna":{"title":"usb: gadget: printer: fix infinite loop in printer_read()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: printer: fix infinite loop in printer_read()\n\nprinter_read() uses the same variable for the requested copy size and\nthe number of bytes actually copied to user space. copy_to_user()\nreturns the number of bytes not copied, so when it fails to copy\nanything, the computed copied length becomes zero.\n\nIn that case len, buf, current_rx_bytes and current_rx_buf are left\nunchanged. If RX data is available and the user buffer remains\nunwritable, the read loop can repeat indefinitely.\n\nTrack the copied length separately and return -EFAULT, or the number of\nbytes already copied, if an iteration makes no progress."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"3f81197364b57e5318620c75f3bd63f405f60552","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"e225e2998e5a9b83c838dbbe4511fb0d63f88daf","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"3081b0e187065c3b9577e393ad664b12854aeaf3","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"994afccfdcceb73be33f69a8a8ea71e260c9eca5","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"e03597ad9494b500344076589aeaa6c6d2d381d3","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"4cde0b38cc0cb8b7dc17295801015148de37d1d2","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e","versionType":"git"},{"version":"b185f01a9ab7af586133be2555298e960237359b","status":"affected","lessThan":"c2e819be6a5c7f34344926b4bd7e3dfca58cf48a","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_printer.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.1","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_printer.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3f81197364b57e5318620c75f3bd63f405f60552"},{"url":"https://git.kernel.org/stable/c/e225e2998e5a9b83c838dbbe4511fb0d63f88daf"},{"url":"https://git.kernel.org/stable/c/3081b0e187065c3b9577e393ad664b12854aeaf3"},{"url":"https://git.kernel.org/stable/c/994afccfdcceb73be33f69a8a8ea71e260c9eca5"},{"url":"https://git.kernel.org/stable/c/e03597ad9494b500344076589aeaa6c6d2d381d3"},{"url":"https://git.kernel.org/stable/c/4cde0b38cc0cb8b7dc17295801015148de37d1d2"},{"url":"https://git.kernel.org/stable/c/e41bbbbb1740ce4d7270ab1cdeca13892d6a8d2e"},{"url":"https://git.kernel.org/stable/c/c2e819be6a5c7f34344926b4bd7e3dfca58cf48a"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:34:28.812Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.1","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}