{"id":"CVE-2026-90335","state":"PUBLISHED","title":"tty: skip cdev_del() when no cdev is registered","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: skip cdev_del() when no cdev is registered\n\nTTY device registration can fail before a cdev is allocated.\nSerial core keeps the port so setserial can still use it, and later\nremoval passes the NULL cdev slot to cdev_del(), causing a NULL-pointer\ndereference.\n\nOnly delete the cdev when the slot is not NULL.","publishedAt":"2026-09-17T16:08:48.127Z","updatedAt":"2026-10-30T12:35:13.192Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68","versionType":"git"},{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"ea3d2fae7c1d6492145976553817d22e8ef69a0e","versionType":"git"},{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"21031bd0d662549412378110c989b164feb6e4be","versionType":"git"},{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"2af4c46b429907edc8cb069c78fca1d950120b98","versionType":"git"},{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"3dbf85ef40b6366ba15e882f7536cdc98bea579a","versionType":"git"},{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"c3b5623fd97648f2747444aa8932ae604662df93","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":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","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/6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68","https://git.kernel.org/stable/c/ea3d2fae7c1d6492145976553817d22e8ef69a0e","https://git.kernel.org/stable/c/21031bd0d662549412378110c989b164feb6e4be","https://git.kernel.org/stable/c/2af4c46b429907edc8cb069c78fca1d950120b98","https://git.kernel.org/stable/c/3dbf85ef40b6366ba15e882f7536cdc98bea579a","https://git.kernel.org/stable/c/c3b5623fd97648f2747444aa8932ae604662df93"],"weaknesses":[],"ingestedAt":"2026-10-30T12:54:04.478Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90335.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90335","state":"PUBLISHED","datePublished":"2026-09-17T16:08:48.127Z","dateUpdated":"2026-10-30T12:35:13.192Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.803Z"},"containers":{"cna":{"title":"tty: skip cdev_del() when no cdev is registered","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntty: skip cdev_del() when no cdev is registered\n\nTTY device registration can fail before a cdev is allocated.\nSerial core keeps the port so setserial can still use it, and later\nremoval passes the NULL cdev slot to cdev_del(), causing a NULL-pointer\ndereference.\n\nOnly delete the cdev when the slot is not NULL."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68","versionType":"git"},{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"ea3d2fae7c1d6492145976553817d22e8ef69a0e","versionType":"git"},{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"21031bd0d662549412378110c989b164feb6e4be","versionType":"git"},{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"2af4c46b429907edc8cb069c78fca1d950120b98","versionType":"git"},{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"3dbf85ef40b6366ba15e882f7536cdc98bea579a","versionType":"git"},{"version":"a3a10ce3429e5dee623ad5c8407ea58e204fcb0a","status":"affected","lessThan":"c3b5623fd97648f2747444aa8932ae604662df93","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":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","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/6c92b8d9c23a92f85b20bee3578d0f19cd1b1a68"},{"url":"https://git.kernel.org/stable/c/ea3d2fae7c1d6492145976553817d22e8ef69a0e"},{"url":"https://git.kernel.org/stable/c/21031bd0d662549412378110c989b164feb6e4be"},{"url":"https://git.kernel.org/stable/c/2af4c46b429907edc8cb069c78fca1d950120b98"},{"url":"https://git.kernel.org/stable/c/3dbf85ef40b6366ba15e882f7536cdc98bea579a"},{"url":"https://git.kernel.org/stable/c/c3b5623fd97648f2747444aa8932ae604662df93"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:35:13.192Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.3","versionEndExcluding":"6.18.57"},{"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"}}}}}