{"id":"CVE-2022-50282","title":"chardev: fix error handling in cdev_device_add()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nchardev: fix error handling in cdev_device_add()\n\nWhile doing fault injection test, I got the following report:\n\n------------[ cut here ]------------\nkobject: '(null)' …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= da97a80a657d1b1b50ef633e8ff5dbf0d417fc8d < 5d2146889fad4cb9e6c13e790d4cfd871486eca8","Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < 6acf8597c5b04f455ee0649e11e5f3bcd28f381e","Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < 34d17b39bceef25e4cf9805cd59250ae05d0a139","Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < d85b5247a79355b8432bfd9ac871f96117f750d4","Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < c46db6088bccff5115674d583fef46ede80077a2","Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < 28dc61cc49c6e995121c6d86bef4b73df78dda80","Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < b5de1eac71fec1af7723f1083d23a24789fd795c","Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < 85a5660491b507d33662b8e81c142e6041e642eb","Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < 11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797","Linux f78b54e7d83c7879f9a6e49e6724019ca34177cc","Linux d79d7d5c878809964da537336dad5ff55fa1605e","Linux >= 4.9.224 < 4.9.337","Linux >= 3.16.83 < 3.17","Linux >= 4.4.224 < 4.5","Linux 4.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:08:55.622102Z"},"published":"2025-09-15","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:10:33.031Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2022-50282","references":[{"url":"https://git.kernel.org/stable/c/5d2146889fad4cb9e6c13e790d4cfd871486eca8"},{"url":"https://git.kernel.org/stable/c/6acf8597c5b04f455ee0649e11e5f3bcd28f381e"},{"url":"https://git.kernel.org/stable/c/34d17b39bceef25e4cf9805cd59250ae05d0a139"},{"url":"https://git.kernel.org/stable/c/d85b5247a79355b8432bfd9ac871f96117f750d4"},{"url":"https://git.kernel.org/stable/c/c46db6088bccff5115674d583fef46ede80077a2"},{"url":"https://git.kernel.org/stable/c/28dc61cc49c6e995121c6d86bef4b73df78dda80"},{"url":"https://git.kernel.org/stable/c/b5de1eac71fec1af7723f1083d23a24789fd795c"},{"url":"https://git.kernel.org/stable/c/85a5660491b507d33662b8e81c142e6041e642eb"},{"url":"https://git.kernel.org/stable/c/11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797"}],"tags":["cve.org"],"epss":0.00184,"epssPercentile":0.08066,"ingestedAt":"2026-11-05T22:38:31.719Z","slug":"CVE-2022-50282","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nchardev: fix error handling in cdev_device_add()\n\nWhile doing fault injection test, I got the following report:\n\n------------[ cut here ]------------\nkobject: '(null)' (0000000039956980): is not initialized, yet kobject_put() is being called.\nWARNING: CPU: 3 PID: 6306 at kobject_put+0x23d/0x4e0\nCPU: 3 PID: 6306 Comm: 283 Tainted: G        W          6.1.0-rc2-00005-g307c1086d7c9 #1253\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\nRIP: 0010:kobject_put+0x23d/0x4e0\nCall Trace:\n <TASK>\n cdev_device_add+0x15e/0x1b0\n __iio_device_register+0x13b4/0x1af0 [industrialio]\n __devm_iio_device_register+0x22/0x90 [industrialio]\n max517_probe+0x3d8/0x6b4 [max517]\n i2c_device_probe+0xa81/0xc00\n\nWhen device_add() is injected fault and returns error, if dev->devt is not set,\ncdev_add() is not called, cdev_del() is not needed. Fix this by checking dev->devt\nin error path.\n\n## Affected\n\n- `Linux >= da97a80a657d1b1b50ef633e8ff5dbf0d417fc8d < 5d2146889fad4cb9e6c13e790d4cfd871486eca8`\n- `Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < 6acf8597c5b04f455ee0649e11e5f3bcd28f381e`\n- `Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < 34d17b39bceef25e4cf9805cd59250ae05d0a139`\n- `Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < d85b5247a79355b8432bfd9ac871f96117f750d4`\n- `Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < c46db6088bccff5115674d583fef46ede80077a2`\n- `Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < 28dc61cc49c6e995121c6d86bef4b73df78dda80`\n- `Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < b5de1eac71fec1af7723f1083d23a24789fd795c`\n- `Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < 85a5660491b507d33662b8e81c142e6041e642eb`\n- `Linux >= 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 < 11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797`\n- `Linux f78b54e7d83c7879f9a6e49e6724019ca34177cc`\n- `Linux d79d7d5c878809964da537336dad5ff55fa1605e`\n- `Linux >= 4.9.224 < 4.9.337`\n- `Linux >= 3.16.83 < 3.17`\n- `Linux >= 4.4.224 < 4.5`\n- `Linux 4.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}