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CVE-2022-50282— chardev: fix error handling in cdev_device_add()

EPSS 0.02% · P4

Affected Version Matrix 22

VendorProductVersion RangeStatus
LinuxLinuxda97a80a657d1b1b50ef633e8ff5dbf0d417fc8d< 5d2146889fad4cb9e6c13e790d4cfd871486eca8affected
233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0< 6acf8597c5b04f455ee0649e11e5f3bcd28f381eaffected
233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0< 34d17b39bceef25e4cf9805cd59250ae05d0a139affected
233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0< d85b5247a79355b8432bfd9ac871f96117f750d4affected
233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0< c46db6088bccff5115674d583fef46ede80077a2affected
233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0< 28dc61cc49c6e995121c6d86bef4b73df78dda80affected
233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0< b5de1eac71fec1af7723f1083d23a24789fd795caffected
233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0< 85a5660491b507d33662b8e81c142e6041e642ebaffected
… +14 more rows
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I. Basic Information for CVE-2022-50282

Vulnerability Information
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Vulnerability Title
chardev: fix error handling in cdev_device_add()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: chardev: fix error handling in cdev_device_add() While doing fault injection test, I got the following report: ------------[ cut here ]------------ kobject: '(null)' (0000000039956980): is not initialized, yet kobject_put() is being called. WARNING: CPU: 3 PID: 6306 at kobject_put+0x23d/0x4e0 CPU: 3 PID: 6306 Comm: 283 Tainted: G W 6.1.0-rc2-00005-g307c1086d7c9 #1253 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:kobject_put+0x23d/0x4e0 Call Trace: <TASK> cdev_device_add+0x15e/0x1b0 __iio_device_register+0x13b4/0x1af0 [industrialio] __devm_iio_device_register+0x22/0x90 [industrialio] max517_probe+0x3d8/0x6b4 [max517] i2c_device_probe+0xa81/0xc00 When device_add() is injected fault and returns error, if dev->devt is not set, cdev_add() is not called, cdev_del() is not needed. Fix this by checking dev->devt in error path.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于cdev_device_add函数中错误处理不当，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux da97a80a657d1b1b50ef633e8ff5dbf0d417fc8d ~ 5d2146889fad4cb9e6c13e790d4cfd871486eca8 -
LinuxLinux 4.12 -

II. Public POCs for CVE-2022-50282

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III. Intelligence Information for CVE-2022-50282

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Same Patch Batch · Linux · 2025-09-15 · 210 CVEs total

CVE-2022-50293btrfs: do not BUG_ON() on ENOMEM when dropping extent items for a range
CVE-2023-53232mt76: mt7921: fix kernel panic by accessing unallocated eeprom.data
CVE-2023-53233net/smc: fix deadlock triggered by cancel_delayed_work_syn()
CVE-2023-53234watchdog: Fix kmemleak in watchdog_cdev_register
CVE-2023-53235drm/tests: helpers: Avoid a driver uaf
CVE-2023-53236iommufd: Do not corrupt the pfn list when doing batch carry
CVE-2023-53237drm/amdgpu: fix amdgpu_irq_put call trace in gmc_v11_0_hw_fini
CVE-2023-53238phy: hisilicon: Fix an out of bounds check in hisi_inno_phy_probe()
CVE-2023-53239drm/msm/mdp5: Add check for kzalloc
CVE-2023-53240xsk: check IFF_UP earlier in Tx path
CVE-2023-53241nfsd: call op_release, even when op_func returns an error
CVE-2023-53242thermal/drivers/hisi: Drop second sensor hi3660
CVE-2022-50291kcm: annotate data-races around kcm->rx_psock
CVE-2022-50292drm/msm/dp: fix bridge lifetime
CVE-2022-50303drm/amdkfd: Fix double release compute pasid
CVE-2022-50300btrfs: fix extent map use-after-free when handling missing device in read_one_chunk
CVE-2022-50301iommu/omap: Fix buffer overflow in debugfs
CVE-2022-50302lockd: set other missing fields when unlocking files
CVE-2022-50299md: Replace snprintf with scnprintf
CVE-2022-50304mtd: core: fix possible resource leak in init_mtd()

Showing top 20 of 210 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2022-50282

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