{"id":"CVE-2026-93214","state":"PUBLISHED","title":"usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_tcm: fix deadlock in usbg_make_tpg()\n\nusbg_make_tpg() held dep_lock while calling\nconfigfs_depend_item_unlocked(), which acquires the configfs root\ninode lock when operating across subsystems. This creates a circular\nlock dependency with configfs_rmdir():\n\n  dep_lock -> configfs root inode lock -> su_mutex -> dep_lock\n\nIn usbg_make_tpg(), dep_lock only serialized the read of opts->ready,\nwhich is a monotonic flag that transitions from false to true exactly\nonce (in tcm_set_name()) and never reverts. Remove dep_lock from\nusbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access\nopts->ready locklessly instead.","publishedAt":"2026-09-24T15:10:36.975Z","updatedAt":"2026-10-19T09:07:26.196Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"3639438a4c83ffc2e564c8c010b92137c5d11cfa","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"78a14ea2284825055ab6c2a1f3489510f560f3a2","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"eef3e62f90d86c1c5651742f84ecc9db1814a893","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"f81a2da137b029a282b9bc64d2f267d242948659","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"d90b0f90e30cd59b36005a4016b15cf02bcd7fb2","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"9dbf74f4022f80f7669d2b3c22c5deb46c1b5674","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_tcm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.5","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","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_tcm.c"]}],"references":["https://git.kernel.org/stable/c/abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277","https://git.kernel.org/stable/c/3639438a4c83ffc2e564c8c010b92137c5d11cfa","https://git.kernel.org/stable/c/78a14ea2284825055ab6c2a1f3489510f560f3a2","https://git.kernel.org/stable/c/eef3e62f90d86c1c5651742f84ecc9db1814a893","https://git.kernel.org/stable/c/f81a2da137b029a282b9bc64d2f267d242948659","https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9","https://git.kernel.org/stable/c/d90b0f90e30cd59b36005a4016b15cf02bcd7fb2","https://git.kernel.org/stable/c/9dbf74f4022f80f7669d2b3c22c5deb46c1b5674"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93214.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93214","state":"PUBLISHED","datePublished":"2026-09-24T15:10:36.975Z","dateUpdated":"2026-10-19T09:07:26.196Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-17T16:02:15.093Z"},"containers":{"cna":{"title":"usb: gadget: f_tcm: fix deadlock in usbg_make_tpg()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: f_tcm: fix deadlock in usbg_make_tpg()\n\nusbg_make_tpg() held dep_lock while calling\nconfigfs_depend_item_unlocked(), which acquires the configfs root\ninode lock when operating across subsystems. This creates a circular\nlock dependency with configfs_rmdir():\n\n  dep_lock -> configfs root inode lock -> su_mutex -> dep_lock\n\nIn usbg_make_tpg(), dep_lock only serialized the read of opts->ready,\nwhich is a monotonic flag that transitions from false to true exactly\nonce (in tcm_set_name()) and never reverts. Remove dep_lock from\nusbg_make_tpg() entirely and use READ_ONCE/WRITE_ONCE to access\nopts->ready locklessly instead."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"3639438a4c83ffc2e564c8c010b92137c5d11cfa","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"78a14ea2284825055ab6c2a1f3489510f560f3a2","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"eef3e62f90d86c1c5651742f84ecc9db1814a893","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"f81a2da137b029a282b9bc64d2f267d242948659","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"d90b0f90e30cd59b36005a4016b15cf02bcd7fb2","versionType":"git"},{"version":"4bb8548df632187d5db50878e71804af5f7c51ad","status":"affected","lessThan":"9dbf74f4022f80f7669d2b3c22c5deb46c1b5674","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/f_tcm.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.5","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","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_tcm.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/abad5daa41cf5d0a0a9cba0397d3a0e7f11e0277"},{"url":"https://git.kernel.org/stable/c/3639438a4c83ffc2e564c8c010b92137c5d11cfa"},{"url":"https://git.kernel.org/stable/c/78a14ea2284825055ab6c2a1f3489510f560f3a2"},{"url":"https://git.kernel.org/stable/c/eef3e62f90d86c1c5651742f84ecc9db1814a893"},{"url":"https://git.kernel.org/stable/c/f81a2da137b029a282b9bc64d2f267d242948659"},{"url":"https://git.kernel.org/stable/c/6bcd9ee6ad6989d1d85a7459687e45b7ad7568d9"},{"url":"https://git.kernel.org/stable/c/d90b0f90e30cd59b36005a4016b15cf02bcd7fb2"},{"url":"https://git.kernel.org/stable/c/9dbf74f4022f80f7669d2b3c22c5deb46c1b5674"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:07:26.196Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.12.109"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"6.18.50"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"7.2.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}