{"id":"CVE-2026-90334","state":"PUBLISHED","title":"tty: clear cdev pointer after cdev_add() failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: clear cdev pointer after cdev_add() failure\n\ntty_cdev_add() drops the cdev reference when cdev_add() fails, but\nleaves driver->cdevs[index] pointing to freed memory.\ntty_unregister_device() later passes that stale pointer to cdev_del(),\ncausing a use-after-free.\n\nClear the slot after dropping the reference.","publishedAt":"2026-09-17T16:08:47.462Z","updatedAt":"2026-10-19T09:01:51.379Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"fb1de260033c215dba438973d82b48562bdc86bb","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"e9e64dd02fd68776afda00777591eca0c3984285","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"33a44333a9dfda044b0e233399b12ead7f8a90ae","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"d331c63570af61ef7aaf516b64a8d6f47518a3a4","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"a83fcddf3c75d004f12aa13555bb73da19fb75a9","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"4f6bd79bb7e55095f09bec9b4eb6c09df1306116","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"5c5a795bf6248fe96f96dd9fd79d66bbb4a92077","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"6645856f0df3aeecd45519cb611415b4b89c2223","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/tty_io.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.3","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":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","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/tty/tty_io.c"]}],"references":["https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb","https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285","https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae","https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4","https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9","https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116","https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077","https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90334.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90334","state":"PUBLISHED","datePublished":"2026-09-17T16:08:47.462Z","dateUpdated":"2026-10-19T09:01:51.379Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.803Z"},"containers":{"cna":{"title":"tty: clear cdev pointer after cdev_add() failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: clear cdev pointer after cdev_add() failure\n\ntty_cdev_add() drops the cdev reference when cdev_add() fails, but\nleaves driver->cdevs[index] pointing to freed memory.\ntty_unregister_device() later passes that stale pointer to cdev_del(),\ncausing a use-after-free.\n\nClear the slot after dropping the reference."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"fb1de260033c215dba438973d82b48562bdc86bb","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"e9e64dd02fd68776afda00777591eca0c3984285","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"33a44333a9dfda044b0e233399b12ead7f8a90ae","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"d331c63570af61ef7aaf516b64a8d6f47518a3a4","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"a83fcddf3c75d004f12aa13555bb73da19fb75a9","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"4f6bd79bb7e55095f09bec9b4eb6c09df1306116","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"5c5a795bf6248fe96f96dd9fd79d66bbb4a92077","versionType":"git"},{"version":"c1a752ba2d6b8a52879c7ab637cff38359ea9827","status":"affected","lessThan":"6645856f0df3aeecd45519cb611415b4b89c2223","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/tty/tty_io.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.3","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":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","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/tty/tty_io.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/fb1de260033c215dba438973d82b48562bdc86bb"},{"url":"https://git.kernel.org/stable/c/e9e64dd02fd68776afda00777591eca0c3984285"},{"url":"https://git.kernel.org/stable/c/33a44333a9dfda044b0e233399b12ead7f8a90ae"},{"url":"https://git.kernel.org/stable/c/d331c63570af61ef7aaf516b64a8d6f47518a3a4"},{"url":"https://git.kernel.org/stable/c/a83fcddf3c75d004f12aa13555bb73da19fb75a9"},{"url":"https://git.kernel.org/stable/c/4f6bd79bb7e55095f09bec9b4eb6c09df1306116"},{"url":"https://git.kernel.org/stable/c/5c5a795bf6248fe96f96dd9fd79d66bbb4a92077"},{"url":"https://git.kernel.org/stable/c/6645856f0df3aeecd45519cb611415b4b89c2223"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:01:51.379Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}